He was a socialist, but not a communist. But to be fair, "capitalism" meant corporate collusion with government, and socialism is presented as the only alternative in the standard false dichotomy of popular economic understanding.
His sexual escapades have no relevance to the truth or falsehood of his arguments. Remember Romans 3:23? All have sinned and fallen short of the glory of God. Sins should be called out, but it's a basic principle of rational discourse to avoid attacking the character of a speaker and instead directly address the argument presented.
If he was a false prophet, what did he prophesy? How specifically was the core principle that all men are equal before God a false teaching?
He wasn't a saint. He was misguided politically and economically. Government holidays are an absurdity in the first place. But I think your post fails to support its initial assertions.