The problem with terrorist profiling...

...Is that EVERY ethic group, gender, and age group have been involved in terrorism.  It's not just "young Middle Eastern men"  like some idiots think.  Pick any group that people clambering for profiling think should be excluded, and you will find a significant number of terrorists.  For example:

Caucasians:  Anyone else remember the Oklahoma City anymore?  Largest terrorist attack on American soil prior to 2001? 

Women: Russia.  Algeria.  Actually, my understand is that one of the big "OMG they're teh evilz!" wielded against guerrilla fighters in Algeria's 1950s war for independence from France was "they use women to carry out their terrorist attacks!"  In other words, ladies have a long history in terrorism.

Eldery:  Algeria again, and quite likely that Al-Qaeda will continue to user elderly operatives in other areas.  There was also that nut who tried to commit a massacre at the Holocaust Museum but got stopped at the door; killed the security guard.  (We do want to stop individual mass murderers and not just those with group backing, right?)

Christians:  I bet the Irish would have something to say about this. 

Even children too young to intiate terrorist action themselves have been used to carry weapons and explosives.

I think we can all agree that we do not want to identify only "most" terrorists and call it close enough.  We want to catch all of them, and only them, before they kill people, right?  Then profiling doesn't help, because there are no "safe" groups.  If we want to go this route, then we need to go all the way to background checks for all passengers.

I don't understand why this is such a difficult concept. 

Then again, let's be honest.  Many people who say "I want profiling" really mean "I don't want to be personally bothered by this security stuff."  Majority priviledge talking loud and clear.