It now appears that the Times Square Bomber was actively blogging on terrorist websites and entered the USA with $80,000 dollars. Both of which would have been picked up under routine scrutiny. In fact according to blogs the investigations were closed and the information was removed from routine law enforcement databases.
Lets start with profiling what is and what is not.
It is okay to ask a person if they are a commie. If a person is identified as a commie than they are exponentially more likely to be prone to criminal activity such as treason and terrorism. Person X is a commie and has purchased explosives. The crime pattern exists and deserves immediate scrutiny. Now asking a commie prolonged questions involving explosives and weapons without evidence that this commie had purchased explosives or firearms would be profiling.