I haven't seen the evidence for "raped kids", but it's certainly true that Chomsky advised and benefitted from Epstein long after any sensible person would have realized that Epstein JUST MIGHT be a bad person.

Unfortunately, Chomsky's always had a problem pulling the ripcord in similar situations. As one of his colleagues once explained, "When most people step in dogshit on the sidewalk, they scrape it off their shoe and keep walking. Chomsky gets stubborn and just keeps stepping in it again and again."

Not that this is relevant to his intellectual contributions, unless it crosses your personal line where involvement becomes complicity.