Hounslow Jews have voiced concern at the town's decision to re-establish links with Ramallah.
Councillors voted to recognise a new twinning organisation which will explore possible cultural and educational ties with the Palestinian town.
Basil Mann, who serves on the borough's Standing Advisory Council for Religious Education, saw the decision as "a move against Israel. We have always felt there was a bit of an anti-Israel feeling in Hounslow."
The towns were first linked in 1988, but no formal twinning activities have taken place in recent years.
However, during Operation Cast Lead in 2009, a group was formed to investigate renewing the twinning arrangement.
At a council meeting last month, Conservatives questioned the motives behind the move.
Deputy council leader Ruth Cadbury said no council money would be spent on the project.
Mr Mann believes "the small working group which is exploring the issue is trying to express some solidarity with the Palestinians. We are hoping the idea might go away."