Hassan Pickers' goal is to conflict leftists and limit them to the areas of (A) class analysis only and (B) fighting the "right".
Thus AIPAC, a bipartisan and overwhelmingly Jewish lobbying group for a foreign ethnostate, becomes a "right-wing billionaire funded lobbying group."
This leaves the many other Jewish lobbying groups, especially the more liberal J Street, conveniently free from scrutiny or association with AIPAC's negative image.