So if and when it is determined that terrorists of the Muslim kind have committed this act (surprise, surprise), what do you propose we do? Your xenophobic red herring argument overlooks the fact that a Muslim can be of any race. The fact is, Islamic theology and doctrine; not race, drive Muslim terrorists to commit mayhem and murder. The more devout a Muslim becomes, the more likely it is that he/she is to commit terrorism. The problem is, no one can hazard a guess when a Muslim individual decides to become more devout and so a "moderate" Muslim who appears peaceful always has the potential to commit terrorist acts - if he/she decides to follow the dictates of the Koran.