Let's just add this:
I was working for a North West Airlines feeder right after 9/11. The company listed me on a NWA flight from MSP to MEM to get home from an assignment. Keep in mind, I was wearing a full uniform and had a proper SIDA badge (which means I had a 10 year background check and drug screening). As part of the "random" passenger checks, TSA pulled me aside to check my bag before I boarded. With me, a 70+ year old nun in full garb.
Now, who do you think should be checked? The 20 something pilot and elderly nun or the 5 young middle eastern men just in front of me?
I would contend that it is a waste of time and an increased security threat to abide by PC rules to prevent someone from being offended than it is to target people based on past aggressors, even if it involves race.