I'm not saying that his activities were completely unknown, just that some internet rando wouldn't even recognize his name back then. I think that a faked email could only be a likely scenario if we were talking about after everyone knew who he was and what he did.

So the 'oh watch out, that 2014 Epstein email might have been faked/forged' is a relatively small likelihood to bother assuming, and totally beside the point since they censored the 'from' in that email and the message didn't indicate previously unknown behavior on Epstein's part.