This will probably be my last post on this. I don't really know how to penetrate the conspiratorial mind. Either way, for people's musing:
1) Analytically speaking, one can make the Jews "generic". They share similar traits between other small prosperous minorities that ran into some bad class situations. The Armenians and Greeks of the Ottoman days, the Copts, the Lebanese in Sierra Leone, The Chinese in the Philippians and SE Asia, The Parsee in India, the Indians in South Africa (who Ghandi himself loathed), and the list can go on. Either way due to various class conflicts and a unique outsiders standing within a culture, the Jews hardly exhibit any unique treatment from "insiders".. as well as the outsiders political attraction to more critical forms of radical political ideologies (such as Marxism) if they are forced into political action.
The conspiracy theories and mistrust of these minorities from insiders, much of the social consequences it leads to, the misplaced trust (from both groups) in ethnicism/nationalism or radicalized "cosmopolitan" ideologies" (communism), and the way the minorities usually operate within the wider culture have much of the same characteristics.
2) While Marx was Jewish, he did not identify himself as one. He always refers to the Jews in third person. He (along with many other 19th century antisemites) thought of the Jews as "decadent reactionary capitalists". He and Engles would trip over themselves hurling antisemitic invective s on his great Jewish socialist rival, Lassalle.
3) If you think the writings of Marx are compatible with turn of the century Russia, you don't understand Marx. Russia was the least likely place to have the revolution in Marx's eyes...besides Slavs may have been the only race in Europe to be thought less of than the Jews. Marx , being the good progressive he was, did not think highly of such a "reactionary" race...even if he was part of some vast "Jewish plot," the Jews he was addressing would not have picked Russia as their target...they would be more focused on mute progressive races and nations, such as Germany.
Either way to attach Marx to a consistent chain with Lenin and assume it is part of some grand plot among the same conspirators already shows great fault with ones logic. It's like saying Hitler and Darwin were in on their racism together...it just ain't so.
4) Another possible refutation. In Mussolini's Italy, before all the Hitler stuff forced the Italians to take more antisemitic stances, the Jews were overrepresented in the fascist party and in Germany the Jews overrepresented the liberal democrats. So there you have it, the Jews could overrepresent various political ideologies.