How can a religion be evil? It is a non-entity.
Either all Muslims are evil or not. Islam is nothing.
My previous post compares your thinking to gun control. The firearms are evil, regardless of who is using it.
Religion is an ideology. Are you saying Nazism and Communism aren't evil ideologies? There were Nazis that followed the party beliefs to the letter (ala fundy Muslims that follow the Koran to the letter), and there were "Nazis" that didn't follow the ideology except to survive in their environment.