Shadow Foreign Secretary Douglas Alexander has warned critics of Israel on the left that “now is the time to deepen, not weaken” economic and cultural links.
Mr Alexander said Labour supporters must “desist from language of delegitimisation” and stop attempts to cut academic and trade union ties with Israel.
Speaking at the Labour Friends of Israel annual lunch in Westminster on Tuesday, Mr Alexander said many on the left of British politics found it “almost axiomatic” to be seen as anti-Israel.
He said: “The debate is endangered even more when the boundary between legitimate criticism of Israeli government policy gives way to some of the worst and most familiar kinds of antisemitism.”