Human rights activists worldwide are demanding clemency for cleric Sheikh Nimr al-Nimr, sentenced to death in Saudi Arabia for taking part in Shia Muslim minority protests in 2011. They warn the execution could inflame the whole of the Middle East.

The Islamic Human Rights Commission (IHRC) an independent non-profit organization based in London, have asked the UN to intervene and prevent al-Nimr’s execution. He is the most respected Shiite cleric in Saudi Arabia, where the majority of the approximately 18 million population are Sunni.

In their address they say: "It is a severe blight on the reputation of this office if it is not able to work to protect the rights of individuals to free speech, to protest, to practise their religion, to a fair trial, to not be subjected to torture, and the right to life."

Despite global condemnation the forthcoming execution has been largely ignored by Saudi Arabia's key allies - the UK and the US, nations that profess to upholding democratic values.

USE ALL DIPLOMATIC MEANS TO INTERVENE AND STOP THE EXECUTION OF SHEIKH AL-NIMR http://t.co/iDWtOG2eGU#No2Saudipic.twitter.com/63dH6xvm84 — Shia News (@shianews313) May 9, 2015

The representative of Bahraini Shiite leader, Shaykh Ali Salman, told the ABNA news agency that US Secretary of State John Kerry was dismayed by the Saudi decision to execute Ayatollah al-Nimr. Allegedly, Kerry was informed about the Saudi decision during a meeting in Riyadh on May 6.

“John Kerry expressed his surprise to President Barack Obama over the decision made by the House of Saud, and by their silence they gave the green light to Saudi Arabia to go ahead with the execution,” the representative said.

In London, where Shia Muslims staged a #FreeNimr rally, RT spoke to former Bahraini MP Jawad Fayruz. He said since Saudi Arabia is “mainly backed by the US and the United Kingdom,” it could be just “one word” from US or UK officials to reverse things and save al-Nimr’s life.

Activist raise the Petition to the UK Prime ministr 2urge him use diplomacy4 #FreeNimrhttps://t.co/1Slrjy7S5L Sign✒️ pic.twitter.com/mj9COR3CFz — علي الدبيسي (@ali_adubisi) May 5, 2015

“Our clear message is to Downing Street, to [PM] Cameron: you have the ability and you can do a lot of things,” said Fayruz, explaining that the British prime minister could use his influence on Saudi Arabia and secure Sheikh Nimr al-Nimr’s release.

The lawmaker also said: “There’s no independent judiciary system in Saudi Arabia” and the case of Sheikh al-Nimr is “politically oriented.” This is especially due to the ongoing war against Yemen, where Shia Houthi rebels overthrew the president, a Saudi Arabian protégé.

Al-Nimr at Risk Petition | UK use diplomacy to #FreeNimr 1,800 signatures so far. Sign https://t.co/b2oKNTX4nXpic.twitter.com/DxJQwZP9qR — Xeنa #FreeNimr (@memoirsofiraq) May 11, 2015

Skeikh al-Nimr became a symbol of the 2011 insurrection when the Arab Spring came to Saudi Arabia. He led Shia Muslim street protests throughout the country, demanding constitutional changes, liberties and an end to anti-Shia discrimination in the kingdom.

READ MORE: Saudi shootout and crackdown: Two dead as police squash Shia rally

Sheikh al-Nimr was arrested on July 8, 2012 in disputed circumstances, after police tracked him down in the eastern province of Qatif and shot him in the leg during a shootout.

#ImamAli SAYING MY NAME WONT BE EASY IN ANY ERA, IN ANY CENTURY NOR IN ANY TIME #FreeNimrpic.twitter.com/BFdwvwdPlb — ShiaⒺAli (ر) (@kassamally) May 9, 2015

The Sheikh’s relatives insisted al-Nimr didn’t own a gun, but the cleric was accused of terrorism and apostasy and put on trial in March 2013. Human rights activists shared concerns since the outset that al-Nimr was unlikely to get a fair trial.

The arrest of Skeikh al-Nimr provoked even more disturbances in Saudi Arabia, as protesters demanded his immediate release, which led to an even greater escalation of violence between protesters and Saudi security forces.

The arguably biased trial lasted until October 2014, with al-Nimr being sentenced to death for “disobeying the ruler,”“inciting sectarian strife” and “encouraging, leading and participating in demonstrations.”

READ MORE: Saudi Shia leader sentenced to death for role in anti-govt protests

The sentence aroused the strongest condemnation from international human rights watchdogs.

Joe Stork, the organization's deputy Middle East director, said: “Saudi Arabia’s harsh treatment of a prominent Shia cleric is only adding to the existing sectarian discord and unrest,” adding that if Saudi Arabia wants to gain stability in its eastern province, it should put an end to “systematic discrimination against Shia citizens.”

According to Said Boumedouha, deputy director of Amnesty International’s Middle East and North Africa Programme, “the death sentence against Sheikh Nimr Baqir al-Nimr is part of a campaign by the authorities in Saudi Arabia to crush all dissent, including those defending the rights of the Kingdom’s Shiite Muslim community.”

Shia Muslims around the world have been holding rallies and petitioning to prevent the execution. When Saudi Arabia announced al-Nimr will be executed on May 14, protests intensified and people took to the streets in Saudi Arabia, Bahrain, India and Iraq.

In Iran, the regional superpower and the only country with a predominantly Shiite population in the Middle East, clerics and scholars staged a mass sit-in on Wednesday in the two holy cities of Qom and Mashhad, to express their solidarity with Sheikh Nimr al-Nimr.

Iranian Shia Muslim clerics warned that Saudi Arabia is going to pay a heavy price if it dares to execute the religious leader, saying the execution could trigger “an earthquake” that would lead to the fall of the Saud dynasty.

Last week, following the beheading of five foreigners, human rights groups condemned Saudi Arabia for a dramatic increase in public executions. Eighty people have already been executed so far in 2015, compared to 88 during the whole of 2014.

READ MORE: Beheading of 5 foreigners in Saudi Arabia triggers outcry from human rights campaigners

Despite mounting international criticism from foreign governments and human rights campaigners, Saudi Arabia has shown no willingness to end public executions.

This is another example of how the international community doesn’t care about human rights in Saudi Arabia, Ali Al-Ahmed, Director of the Institute for Gulf Affairs, told RT.

“It really reflects a lack of interest on the part of the international community, especially Western countries who have been calling themselves champions of human rights. The [the West] look at them [Arab world] as unworthy of having human rights and we see international hypocrisy at its peak,” he said.