I mean compared to how it could be, hasn't caused any mass murder or something like that. Just basic political ideologies that formed nations have done that much (that you described). To me it's more amusing if anything, and at best slightly sympathetic.
No, I'm with
@Valjean on this. It is serious.
In the US today, you have a significant proportion of the country either swallowing the Big Lie, or going along with it for reasons of tribal political loyalty, that the last election was stolen and that the US voting system can't be trusted. This in the face of mountains of evidence, from a wide range of sources, including about 50 court judgements, that it is secure and robust.
The way to get people into that absurd frame of mind is to undermine their hold on reality*, so that they cease to trust anything and instead place their faith in their Leader. QAnon is all a part of this, albeit at one extreme end of the spectrum of crazy falsehood, which is why it is encouraged, either tacitly or overtly, by people like Trump, Flynn, Taylor Greene and others.
If about 30% or more of the population convince themselves the voting system is rigged, the news can't be trusted and instead they must place all their faith in a Leader and his acolytes, you are marching down the road to insurrection and and dictatorship. According to what I read, the USA is at 25%. You can see some of them on this forum.
* cf. Hitler, Stalin and Orwell's 1984.