Weiner has made himself the javelin catcher for attacks from the morons with two right nuts. First, he out-debates them constantly, and puts up with attempts at intimidation all the time. Then he married one of Hillary Clinton's aides, and she is a practicing Muslim, which is enough to cause apoplexy in most all teabaggers.
He has been getting way more attention than the haters can deal with, so Breitbart figured he could pull another of his tricks.
And as always, it is destined to backfire on him, he just isn't clever enough to get away with messing with the democrats.