We, as concerned academics, legal, humanitarian and media professionals, condemn the Syrian government’s grotesque massacre in its aerial bombardment of a well-known and busy market in the Damascus suburb of Douma on Sunday 16 August 2015. As we write the killing continues.

We call on the UK government to condemn this act and to demand, as per UN resolutions, that the Syrian government immediately and unconditionally stop bombing its civilian population. The death toll has reached over 100 – among them women and children – with at least 200 injured and maimed by the bombings. The UN’s own humanitarian chief, Stephen O’Brien, was in Damascus pushing for more humanitarian access with the Syrian government just before these indiscriminate bombings took place.

Such utter contempt for international conventions by a so-called state actor reaffirms, if any further evidence were needed, that the Syrian government long ago relinquished any claim to legitimacy or sovereign power and should be expelled from the UN altogether. The UN must urgently consider carrying out its chronically underfunded humanitarian work in Syria without having to pander to Bashar al-Assad’s security forces via the ministry of the interior.

Assad’s killing machine has become the norm – and our silence makes us complicit in his crimes. The media has focused on the vile crimes of Isis, yet the overwhelming majority of Syrians continue to be killed and maimed by the Syrian government, which drops crude barrel bombs on the towns and cities that bravely rose up against tyranny and dared to demand their political rights in 2011.

As the Palestinian liberation struggle shows us, it is never acceptable, and is illegal under international law, to bomb civilian areas or to collectively punish populations. No government should be allowed to pursue their political opponents by indiscriminate bombing. We also urge all involved governments to desist from the pointless bombing of civilians in so-called Isis territory, which results in more misery, and instead to intensify all avenues of diplomatic pressure on Iran and Russia to stop propping up the Syrian government and providing it with manpower, loans, weapons and military hardware.

Besieged Syrians in rebel-controlled Douma have continued to maintain their dignity, while the Syrian government wilfully ignored the unanimous UN Resolution 2139 (2014) adopted by the security council (and reaffirmed in the UNSC meeting on 18 August 2015) calling for unfettered humanitarian access to allow food and medical supplies to flow. Once again Syrians are reduced to picking up the mangled body parts of their children from the rubble. The international community has lost its moral compass and as a matter of principle for our humanity, not only for the Syrians who have been abandoned in this conflict, we must act to find it.

Dr Miriyam Aouragh Leverhulme fellow, Communication Media Research Institute, University of Westminster

Dr Sune Haugbolle Associate professor, global studies and sociology, Roskilde University

Dr Rupert Read Reader, School of Politics, Philosophy, Language and Communication Studies, University of East Anglia

Dr Joschka Ivanka Wessels Postdoctoral researcher, Copenhagen University

Dr Phil Hutchinson Senior lecturer, philosophy, Manchester Metropolitan University

Dr Sara Ababneh Researcher, Amman

Dr Anat Matar Philosophy department, Tel Aviv University

Dr Mandy Turner Director, Kenyon Institute, Jerusalem, and visiting fellow, Middle East Centre, London School of Economics

Bissane El-Sheikh Al-Hayat newspaper, Beirut

Laila Alodaat Crisis response programme manager, Women’s International League for Peace and Freedom, Geneva

Malath Al-zoubi Media specialist, London

Maia Malas Television producer, London

Amr Salahi Syrian exile, London

Safaa Jousif Syria NGO worker, London

Ibrahim Fakhry Syrian activist, Oxford

Clara Connolly Human rights lawyer, London

Nora Ababneh Project director, Internews

Sai Englert Postgraduate representative, national executive council, National Union of Students

Reem Shafiq Doctoral counselling psychology trainee, researcher, London

Nick Evans PhD candidate, Wadham College, Oxford University

Juliette Harkin PhD candidate, School of Politics, Philosophy, Language and Communication Studies, University of East Anglia

Sonny Dubabuse Liverpool

David Phillips Brighton

• Re Seumas Milne’s article “It’s not migrants who are the marauders and plunderers” (13 August), most people (I think) would agree that western interference has caused acute misery for the people of the Middle East, but to include Syria with Iraq and Libya is unfair to the Syrian people. This is their revolution.

The Assad regime was responsible for starting this devastating war by a brutal military response to peaceful demonstrations by the people of Homs who were asking for reforms following the arrest and torture of schoolchildren in Daraa for spraying anti-government graffiti on a school wall. The armed struggle that followed was led by young and middle-aged men in Homs who accepted/bought guns from anyone/anywhere in order to defend themselves and their city. Many arms came from army deserters who brought their guns with them, or were stolen from military compounds. Under siege they asked for help from the west because Russia and Iran were supplying Assad with everything he asked for. Nothing that was sent to the revolutionaries was effective against regime’s tanks and fighter jets.

This revolution has been taken away from the Syrian people not only by western interference, but also by Russia and Iran. To not even mention this is puzzling. It does nothing to help the millions of Syrian civilians still suffering both outside and inside Syria, after almost five years of war with no end in sight. The Assad regime has imploded and is now run by Iran. Yes, western interference has “played a crucial role in Syria’s destruction”, but there are millions of Syrians who need our support, not dismissive political one-liners. It is their revolution – they want to return and rebuild, not risk their lives trying to reach Europe.

June Liveley

Hebden Bridge, West Yorkshire

• Martin Chulov’s report (18 August) of the Syrian regime’s bombing of rebel-held Douma once again poses the conundrum I have been trying to unravel for the last three years: why Bashar al-Assad and his collaborating militias, despite their superiority in military hardware, have continued to suffer more casualties than the rebels lined up against him? The latest figures compiled from various sources, including Syrian Observatory for Human Rights, place the pro-government casualties at 139,525 versus anti-government loss of 135,000.

Mohammad Abdul Qavi

London

• I find the inability to publish the findings of the Chilcot inquiry forthwith reprehensible. With the second anniversary of the gas attack on the Damascus suburb of Ghouta this Friday, which killed upwards of 1,000 innocent civilians, many politicians used the disaster of the 2003 invasion of Iraq as a reason for inertia after this massacre. As one who served in both Gulf wars and tours in Iraq and Afghanistan, and having been into Syria a number of times in the last two years, I can say that Syria is nothing like Iraq in 1990 or 2003. The inaction by the international community post-Ghouta has put us in a position where upwards of 300,000 are dead, over 5 million refugees, including 1.5 million seeking shelter in the UK and Europe, Assad still in power and the so-called Islamic State controlling vast tracts of Iraq and Syria. Military action after Ghouta, as requested by President Obama would, in my opinion, have put us in a much better place today.

Parliament, we are told, will vote on extending action to defeat Isis in Syria shortly, and this “fight of our generation”, which we can’t afford to lose, cannot be corrupted by so-called mistakes of 2003. If there are statesmen, politicians and civil servants who are criticised by Chilcot, so be it. We live in a democracy and they should not be able to hide behind legalese to prevent their misjudgments and failings being public. We owe this to my comrades we left on the battlefields of Iraq, whose families now rightly seek closure, and to this nation, to ensure we are not fighting Isis on the streets of Britain for the next 10 years.

Hamish de Bretton-Gordon (Col Retd)

Shaftesbury, Dorset