Marx was anti-religion entirely (opium of the masses, remember?) and believed capitalism would and was in the process of dissolving what he considered to be "false consciousnesses" which included religion and other forms of parochial relations like feudalism. He never called for Jews to be exterminated.

The reason you do this bit in the first place isn't even to attack Marx. It's to smear critics of Israel and its meddling in Western affairs as Marxists. Everyone knows what your schtick is by now.