But that's precisely the point. We should NOT accept it! We should ridicule these groups, and their silly beliefs. If everyone is ridiculing them, their threats become meaningless. They become exposed for the bullies they are.
It's just like bullies at school. As long as everyone's afraid of them, they can do what they want. If everyone gangs up on them, protecting one another from the bullies, they no longer have the power to do any harm.