Why Ground Zero?

Today is Pamela Geller's protest in New York against the Ground Zero mosque. If this mosque were being built anywhere else, nobody would care. But to deliberately choose the very site where Muslim terrorists killed Americans and destroyed iconic buildings -- well, if you are an American and you're not outraged, you must be ultra-liberal. Has September 11 been forgotten so quickly? I just don't get it at all, but I fear that political correctness has made some people want to kowtow to the enemy, and forgive and forget even the worst atrocities.