Arresting terrorists = disenfranchising blacks?!?

As I've noted before, anytime something good happens for or to the US, the fringe left loons get so depressed they start spewing irrational hate speech. And it's hard to get more irrational than this (via Confederate Yankee):

This raid sounds like b.s. and voter intimidation to me This is more of J.E.B.'s campaign to keep black people in Florida from voting. Bet on it.

Is it considered impolite to laugh at the insane?