Teabagger fail.
Yes, I understand the concepts behind the sign, but come on, if you can’t express your thoughts clearly, you really shouldn’t be making a sign.
Still, I see your sign-that-makes-little-sense and raise you a sign-advocating-terrorism-against-a-sitting-president-complete-with-misspellings:

I have no idea of the source. Enough fail to go around on both sides.