The Zionist Federation has claimed an advertising campaign in support of Israel was rejected by a number of organisations following the Gaza conflict.
It said Transport for London had refused to run adverts comparing Hamas to other terrorist groups including Islamic State on the London Underground because they were “too controversial”.
The ZF had ear-marked £12,000 to run the adverts following the rise in anti-Israel activity in Britain this summer.
It had hoped to “place Israel’s actions in the context of the wider struggle against religious extremism in the Middle East”, the organisation said.