LONDON — A branch of Sainsbury’s grocery store removed kosher products from its shelves, it said, to prevent anti-Israel demonstrations. The Tricycle Theater in north London, after hosting a Jewish film festival for eight years, demanded to vet the content of any film made with arts funding from the Israeli government. George Galloway, a member of Parliament known for his vehement criticism of Israel, declared Bradford, England, an “Israel-free zone.”

Mr. Galloway, in comments being investigated by the police, said, “We don’t want any Israeli goods; we don’t want any Israeli services; we don’t want any Israeli academics coming to the university or college; we don’t even want any Israeli tourists to come to Bradford.”

The war in Gaza and its aftermath have inflamed opinion in Europe and, experts and analysts say, are likely to increase support for the movement to boycott, disinvest from and sanction Israel, known as BDS.

“We entered this war in Gaza with the perception that the Israeli government is not interested in reaching peace with the Palestinians,” said Meir Javedanfar, an Israeli analyst at the Interdisciplinary Center Herzliya, a private university. “Now, after the casualties and the destruction, I’m very worried about the impact this could have on Israel. It could make it very easy for the BDS campaign to isolate Israel and call for more boycotts.”