It's easy to blame Russia and China, but it's not really that. It's clear that this is a symptom that something is wrong, and that is stagnating or worsening living conditions, unhappiness with how society operates and people hearing that turn to reaction.
Left doesn't have an answer given how marginalized they are, all you get are center-lib parties that pretend everything is okay or that focus on liberal middle class issues. It's no surprise
Congratulations, you've written probably the most hitlerite comment I've seen on Lemmy so far, and I'm genuinely concerned.
Instead of investigating what makes people act this way in terms of material conditions, incentives and values that are promoted, maybe the way power is organized and how it leads to inevitable opportunism or this being an inevitability of a class dictatorship that we have now, you instead go for the "undesirables" angle.
People didn't vote for the candidate you wanted because they were irredeemably evil. What do we do, kill all MAGA voters now for having the wrong human archetype? Prohibit them from voting? That only seems the natural conclusion from everything you wrote.