In my opinion we should just ban all Muslims from flights. Screw them if they don't like it, they're bringing all this on on themselves.
The problem is that the determined Islamofascist terrorist suicide bomber can be of any race, any sex, any age.
Recent reports have al Qaeda seeking white European or American recruits to circumvent profiling of persons from the Middle East, Africa, and South Asia. One account of the London airliner bombing plot has two members of the plot being recent converts to Islam. Although I have not read it for a fact, I assume that if they are white, they would have used documentation with their previous, non-Muslim name since a white person with a Muslim name would (or should) bring closer scrutiny at an airport security check.
There is a lot of coercion to conform to the group norm in Muslim society. Despite this, terrorist suicide bomber recruiters (even with a 1+ billion Muslim starting base) find coming up with a core of fanatical AND reliable individuals is difficult. IMO, the reason for this is that, despite the rabble rousing and propaganda being spewed out by the terrorists and their enablers, the vast majority of Muslims, while not necessarily being pro-Western in their views, reject the use of violence to acheive their ends. Otherwise, the Coalition forces in Afghanistan and Iraq and the Israelis in Lebanon would be facing continuous human wave attacks. There are a lot of personal decisions involved to go from an average semi-secular follower of Islam ---> Islamist ---> Islamofascist ---> Islamofascist terrorist ---> Islamofascist terrorist suicide bomber. As the focus becomes more extreme, a lot of Muslims fall away.
Assuming for the sake of example (and this is a very generous assumption), that there is a population of 1 million Muslim "bitter enders," that means that (using a 1.2 billion total Muslim base) less than 1 in a 1000 Muslims would be involved. Or stated another way, 99.999% fall somewhere else along that chain of decisions I mentioned earlier. Although it is would be impossible to know due to coercive factors, I wonder how many would fall away at the nominal Muslim to Islamist decision point if they really had a free choice without repercussions.
As for the babes in their murdering parents' arms, they should be considered innocent, helpless victims. The orthodox Muslim theological view is that, until they have the capacity to knowingly declare otherwise, all babies are born Muslim. If they die in the attack, they die Muslim and go to Paradise.