If you come to my community to attack its members and my friends and neighbors, you are not welcome.
It is not just your community, some people in the same community want to hear it. If you do not like what someone has to say, don't go see them. Why do you think you should be the decider of what people other than yourself listen to?
Some people who for some reason have chosen to live in my community but hate it and are hostile to it want an enemy to come inspire more hatred of my community? Nope.
Once again, it is not your community, it is the community of everyone that lives in it. You are not the king nor the god of the community, thus it is not yours and yours alone.
Live and let live...the best way to go through life