I don't see how anyone could honestly believe 50 women are lying about being raped/assaulted by him. Maybe when the first woman came out, you could justify having suspicions, but not fifty women.
But you do deserve blame for that statement. You didn't create the world, no one did. What you said is the exact definition of sexism, and you cannot deny that. It's people like you that make me not want to identify as a Men's Rights Activist.