The separation of church and state was enacted to prevent the government from forcing the people to choose on religion over the other like England did at the time. It wasn't designed to be used to disavow all religion, just not to endorse any one religion.

As for Islam, I am not discriminating against it just the way radical Islam uses it. Islam is fine as long as they do not try to force everyone to join of die which is happening in many places right now and maybe a neighborhood near you soon.