How the fuck could Marx ever be conceived, by anyone, as an anti-semite? Because he spoke out against religion? So being critical of organized religion makes you an anti-semite?

Because he wrote this, although it's debatable. He could be called a "casual antisemite."

https://books.google.com/books?id=QV7DFaVwnGMC&printsec=frontcover#v=onepage&q&f=false

Page 772

He was casually antisemitic - "yid" was one of the insults he threw at his rivals for the leadership of the socialist movement in Germany; but his murderous feelings towards his rivals, like the abuse he hurled at them, were political, not racial.

Uh-huh. Yes, all Jews were patriots. Totally. All several million of them all had the exact same agenda, right.

I said most Jews were Conservatives, Liberals, and Social-Dems, and that they were also patriots. German Jews supported the war as must as ethnic Germans. In, The Coming of the Third Reich, Richard Evans debunks the old Nazi myth of Jews being lazy traitors to Germany.

Even before the war, the Pan-Germans and others on the right had pumped out propaganda accusing the Jews of undermining the German nation. This kind of racist conspiracy theory was more than shared by military leaders such as Ludendorff. It found notorious expression during the war in the so-called Jewish census of October 1916, ordered by senior army officers who hoped it would give them support in refusing Jews admission to the officer corps once the war was over. The aim was to reveal the cowardly and disloyal nature of the Jews by showing statistically that Jews were under-represented in the army, and that those who had joined up were overrepresented in desk-jobs. In fact, it showed the reverse: many Jewish Germans, like Victor Klemperer, were nationalist to the core, and identified strongly with the Reich. German Jews were over- rather than underrepresented in the armed forces and at the front. Confounding the expectations of antisemitic officers to such a degree, the results of the census were suppressed. But the knowledge that it had been ordered caused a great deal of anger among German Jews, even if the attitudes it revealed were not shared by the majority of rank-and-file troops.197

After the war, the widespread belief on the right that the German army had been ‘stabbed in the back’ by revolutionaries in 1918 translated easily into antisemitic demagogy. It was, men like Ludendorff evidently believed, ‘the Jews’ who had done the stabbing, who led subversive institutions like the Communist Party, who agreed to the Treaty of Versailles, who set up the Weimar Republic. In fact, of course, the German army was defeated militarily in 1918. There was, as we have seen, no stab-in-the-back. Leading politicians who signed the Treaty, like Matthias Erzberger, were not Jewish at all. If Jews like Rosa Luxemburg were over-represented in the Communist Party leadership, or, like Eugen Levine in the revolutionary upheavals in Munich early in 1919, they were not acting as Jews but as revolutionaries, alongside many non-Jews (such as Karl Liebknecht, whom many right-wingers thought instinctively must be Jewish because of his ultra-left political views). Most Jewish Germans supported the solid liberal parties of the centre, or to a lesser extent the Social Democrats, rather than the revolutionary left, whose violent activism shocked and appalled a respectable citizen like Klemperer. Nevertheless, the events of 1918-19 gave a boost to antisemitism on the right, convincing many waverers that racist conspiracy theories about the Jews were correct after all.198

I also never called you an antisemite.