When fully capable adults do stupid things, like voting for an man with as many very serious faults as Trump, I blame them for doing it. That Democrats were ineffective at convincing people (or inspiring them) not to do something stupid doesn’t make the thing any less stupid to do. Inspiration is not required to avoid being idiot.
Thing is, normalizing stupidity and shitiness doesn’t help anything either. It actively makes things worse. I don’t know what the actual answer is to improving things with that kind of person though. I just think pretending that being a shitbag is acceptable behavior ain’t it.