Donald's blatant anti-Semitic tweet----Bad!! pic.twitter.com/VkuUydh8b2— Calyban (@Calybancalyban) July 2, 2016
The Trump Campaign later fixed the graphic, replacing the Star of David with a circle, and then deleting the original tweet.
This of course, accomplishes two things. First, the original tweet got the message out to the people it was supposed to reach, and the controversy amps up the attention.
But the main thing is that now, they have a little plausible deniability. They can claim the original was PhotoShopped to make them look bad because The Left is just that diabolical and they'll stop at nothing to destroy America's Truly Noble Conservatives blah blah blah. And that keeps things rolling with even more free media.
This shit doesn't happen by accident.