No, this is wrong. I don’t know any leftists that are antisemitic, and plenty of leftists subscribe to the Jewish Voice for Peace, the largest progressive Jewish anti-Zionist organization in the world. Definately not antisemitic.

There has been a strong propaganda push to cast leftists as antisemitic in an attempt to deligitimize protest against indiscriminate bombing of civilians and human rights violations. Plenty of rabbis have been arrested for protesting military attacks on civilians and they aren’t antisemitic.

Secondly, I don’t think there is a close connection between leftists and Nazis. In fact some leftists formed a group called Antifa which is short for Anti Fascist. Fascism is the ideology of the Nazis, which is absolutely opposed - and opposite to leftist thinking. Fascism is very much a right-wing ideology.

I’m sure an overwhelming majority of leftists are against torture and murder of any people regardless of race or religion.