Tomorrow afternoon a memorial service will be held for David Haines, one of the three Britons kidnapped by Isis in Syria. David and Alan Henning travelled to Syria to help their fellow man by delivering vital humanitarian support to those who needed it most. Their desire to help was not driven by their religion, race or politics, but by their humanity. David and Alan were never more alive than when helping to alleviate the suffering of others. They gave their lives to this cause and we are incredibly proud of them.

We are writing this letter because we will not allow the actions of a few people to undermine the unity of people of all faiths in our society. How we react to this threat is also about all of us. Together we have the power to defeat the most hateful acts. Acts of unity from us all will in turn make us stronger and those who wish to divide us weaker. David and Alan’s killers want to hurt all of us and stop us from believing in the very things which took them into conflict zones – charity and human kindness. We condemn those who seek to drive us apart and spread hatred by attempting to place blame on Muslims or on the Islamic faith for the actions of these terrorists.

We have been overwhelmed by the messages of support we have received from the British public and others around the world. We call on all communities of all faiths in the coming weeks and months to find a single act of unity – one simple gesture, one act, one moment – that draws people together, as we saw in Manchester last week and as we are coming together in Perth today. We urge churches, mosques and synagogues to open their doors and welcome people of all faiths and none. All these simple acts of unity will, in their thousands, come together to unite us and celebrate the lives of David and Alan. This is what David and Alan truly stood for.

Michael Haines and Barbara Henning