They were suspicious because he was a known pedophile who prostituted young girls from Eastern Europe, who showed up with two young-looking girls from Eastern Europe. That’s not evidence, but it’s enough to arouse suspicion, which is the point.

The Hitler thing is a straw man; Hitler was not known for pedophilia or necrophilia. Epstein was already known for soliciting prostitution from underage girls who matched the profile of the ones he brought to the MIT Media Lab offices.