I agree, obviously. I also think there are a lot of ways such info can be used. If you use both options discussed here- selective blackmail and less draconian profiling, it explains a lot.
There is a third aspect- a likelihood, I think, that I find interesting.
Anyone remember "Blazing Saddles"?

Mel Brooks ' incredibly funny film about racism, and about a black sheriff in Texas.
In one scene, he puts his sixgun in his own ear, and says, "Nobody move, or the nigger gets it!"

I think that neither John Conyers nor Henry Waxman wants to be the guy who pushes the nutcase in the oval orifice so far that a truly catastrophic confrontation is triggered, because they don't think they can win it, and the blowback would include the utter destruction of what remains of the US constitutional checks.
 

"There is mysterious music in democracy, when people decide to believe in themselves." ---Bill Greider, The Nation.