I am sure there are conspiracy theories everywhere but it feels like even some of the crazier ones are becoming mainstream in the US. I worry that staying here too long is playing chicken against the possibility of a crazy+competent person taking advantage of the conspiracy theories in ways Trump couldn't fully do.
People worrying about Qanon might just be suffering from selection and recency biases. If you don't quantify it and compare it to other conspiracy theories that you already tolerate, it might be an illusion. So much of this culture war stuff seems to be driven by those biases and complete failure to understand the scale of anything. Using instead, the frequency of news report and social media posts to estimate how popular an idea is.
People are credulous of falsehood and don't seem able to apply critical thinking. Maybe these collective delusions help the deluded groups in some way... or serve the needs of a power structure.