It's one thing to say "I'd like to move away to another place with more like-minded people" or even "I'd like to influence my country to align better with my own values". Great. Those are both pretty uncontroversial, non-extremist opinions. It's a whole other kettle of fish to believe "My country/city should be replaced by one composed of exclusively like-minded people." Particularly problematic if by like-minded people, you mean followers of a particular religion.