The Koran says kill non-believers.
It has been said a radical muslim kills infidels, and a peaceful muslim wants a radical muslim to kill infidels.
Taqiyya is religious justification for muslims to lie in defense of, and to advance islam.
So one take on so called peaceful muslims, is to distrust every single one of them, so as to cover those among them that have you fooled.
These two perps obviously had everybody fooled. They committed Taqiyya, while preparing for this and fooling everybody.
It is a scary situation. I am in a department with 33 other professors. We have three Muslims in the department, all of whom have been here many years and become part of our family. Today we had a Christmas Party and all three of these men came bearing ethnic food they had prepared themselves for our pot luck. Their sense of shame over what happened last night was palatable. I made it a point to be physical with them -- pats on the back, etc -- just to let them know I did not hold them personally at all responsible for what happened.
I think in every workplace in America, Muslims are going to be looked at with much more suspicion. The prime objective of the terrorists is to drive a wedge between mainstream Muslims and all infidels everywhere, forcing the mainstream Muslims to choose sides.
I completely agree there are fundamental problems with this religion that make it incompatible with modern civilization. That needs to be addressed. But most Muslims in the USA are just people who are trying to get by like everyone else. I wonder if there might be some way to deal with this more strategically, both domestically and in terms of foreign policy. There are many Arab Muslims who live happily and peacefully in Israel, for example. Maybe we could look to Israel for some answers as to how to figure out who is likely to be a threat and who is not.
I don't know what the answer is. But I think a purely knee-jerk reaction is what the terrorists count on, and we need to be more proactive, less predictable, quick and swift with punishment, and most of all approach this as a long-term strategic issue as opposed to pretending each case is an isolated incident.