Leftists always hated jews. They still do. They've never changed on that fact.

• Islamists & Palestinians hate jews because they want to exterminate jews
• Black National Socialists hate jews because they see them as a particular cabal of whites.
• Socialists hate jews because jews are heavily involved in trade and finance and are literally the capitalist class.
• Marx hated jews because of his own personal problems and because that is literally what he meant by 'capitalist'. His entire view of "Capitalism" is just another way of him saying "Cultural Judaism". Marx didn't use the words "Judeo-Capitalism", but there isn't any other way of saying it when you read his work and how he understands jews. Even the word "Bourgeoisie" is a reference to jews: landless city-dwellers.
• National Socialists are just formalizing Marx's concept of Capitalism as Judeo-Capitalism and being specific about it.
• Even Leftist jewish intellectuals hate jews, of the specific nationalist, orthodox, or religious variety; to the point that they have repeatedly sided with both Communists, Nazis, and Fascists in their opposition to those more religious or nationalist jews.

Truth is: the jews did nothing wrong.

In fact, they did almost everything right:

• Save money
• Be literate
• Form close-knit communities
• Develop a skill or trade
• Hold to your faith.

When jews succeed by doing this, it normally happens much faster than the domestic population, and that's where the problems start. Resentment from domestics, and paternalism from immigrants.