Ehh, I do think people not voting are also responsible (or well, given what I know about US voting only the ones that really had the choice). They actively said "I don't care if the racist shithead trying his best to emulate hitler will be president". If you choose not to vote in a democracy you're saying you're fine with any outcome.

I don't think the individual responsibilty there is huge by any means - I've also long held the opinion that the average person in nazi germany (and any similar country) only had a very small part of the blame if they simply did nothing, because people have all sorts of shit to deal with. But that doesn't absolve them of all responsibility either. And at least in sane countries, voting is such a tiny bit of effort that not doing so is hard to excuse (but again, from what I know that's not always the case in murica).