First, you're again jumping to conclusions about what people believe in order to straw man them - I've never heard anyone call for Hillary's murder, only her imprisonment. I still don't see that kind of thing as representative.
Second, by this kind of logic, the Muslim ban was a great idea. While only an incredibly small percentage of them actually committed terrorist acts, what's the acceptable percentage of those who think that radical Shari'a is a good idea, even if they don't engage in violence? 25%? 10%? Look, here's another random unverified poll that says half of all British Muslims support illegalization of homosexuality: https://www.theguardian.com/uk-news/2016/apr/11/british-musl... Guess we should systematically discriminate against them!
In both cases you are using stereotypes to hurt people. This is not to say Qanon people should be given a free pass, call them out on their bullshit. But I think the percentage would have to be nearly 100 in order to justify any extreme actions against Qanon. And it clearly isn't.