1. Marxism is not a religion or celebrity cult where people “stan” Marx and the validity of his theories is proven by his exemplary personal life, it’s a science of political economy that’s been used, adapted, critiqued, and modified by billions of people for almost two centuries. It’s called “Marxism” for the same reason it’s called “Darwinism” - he’s the guy that laid the theoretical foundations of a scientific theory.
2. Presuming this is about “On the Jewish Question” (one of Marx’s earliest writings which predates The Communist Manifesto and indeed his own formulation of Marxism), the myth that it’s a virulently antisemitic text has been repeatedly debunked (short version from Jacobin, long version from Jewish socialist Hal Draper). He was in fact arguing for the emancipation and granting of citizenship rights to Jews within the overwhelmingly antisemitic climate of early 19th century European politics.
Tumblr isn’t letting me embed links right now for some reason so articles mentioned: