If one were to judge by the declarations of recent decades, Marxists of the Trotskyist persuasion, from the now near-moribund U.S. Socialist Workers Party to the International Socialist Organization, are mostly bitter enemies of any expression of Jewish nationalism, above that of any other national claim of a small ethnic group on the planet. It would seem that while this attitude of special hostility toward Jews in particular does go back very far in the Marxist movement, originating in the nineteenth century view that Jews were not workers and hence akin in some way to the capitalist enemy, the Trotskyist movement in particular hardened up on this issue from the time of the June War in 1967 and was a bit more understanding in an earlier period. This shift in position is documented in a particularly interesting article written some years ago by Werner Cohn, which can be found on his website:

From Victim to Shylock and Oppressor: The New Image of the Jew in the Trotskyist Movement by Werner Cohn.