Harriet Crabtree, executive director of the Inter Faith Network for the UK explained during News Hour the importance of all faiths standing united against terrorists.
She said: "Even though we have areas where we may disagree about issues, even though there are things that we genuinely need to discuss - on fundamentals, on basic values, on the way that we live together there is a huge amount of commonality and a strong desire to stand up for each other.
"I would urge people to find ways - just open up conversations - not to be scared of saying the wrong things. Not to be all frozen up because you might say something that accidentally causes offense. Just open up and try."
Scotland Yard has announced that Muslim worshippers going to mosques in London will see more of a police presence, following the attack.
Crabtree said despite Muslims being attacked, people of all faiths would be affected by what the Prime Minister has described as a 'sickening' act.
She added: "Particularly acute though I think is the feeling of pain when people are attacked in or near a place of worship; and for that, I think the faith communities have a sort of visceral sense of connectedness with each other.
"It's much harder to stand together, it's much harder to do things together if you haven't already built connections and links."
Listen to Harriet Crabtree, executive director of the Inter Faith Network for the UK speaking with Premier's Marcus Jones:
