Where did you get that idea?
Yes, the majority are that stupid, whether you refuse to believe it or not.
Humans are pack animals. What that means is that the vast majority have to be followers, not leaders. Followers want simple beliefs handed to them as "received wisdom", to be certain they are RIGHT, without having to think about it, at all. They look to "leaders" to provide that. A leader waving an ancient "sacred book" as authority is the best kind.
There are plenty of would be "leaders" who are more than happy to provide thoughts for the unthinking. Hitler was one of the most successful, picking on any and all minorities equally, but many pulpits host a "leader" with similar ambitions, and a willing flock. For many others, TV and radio shows are their pulpit, for the same ambition, and to a larger, but just as willing flock.
Minorities are convenient targets for the rabble rousers, and the only counter is for minorities to show power and determination sufficient to look dangerous. That's what "Task Forces" are for.