Wow, Bob! If I'm a member of al-Qaeda or ISIS I'm jumping up and down for joy at your post. You've just announced to the world that Islamic terrorists can shoot or bomb people and you're going to lay the blame on someone else. In fact, you're going to lay the blame on the one part of American society who's willing to fight back.
Now, if I were an Islamic militant, I can either view that as "Good! I can blow these infidels to smithereens over and over and over again and get away with it" or "Bad! Now I'm going to have to do this more often and with much more violence because they aren't getting the message I'm sending them."
Either way, Bob, al-Qaeda and ISIS thanks you.

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