This is apparently the guy who rushed Trump in Dayton Ohio, Tommy DiMassimo. Apparently this is him is at an earlier demonstration, disrespecting an American flag (click on the picture to start the video – UPDATE: While the video is real, and was posted by DiMassimo on YouTube, the added Arabic/ISIS elements were a hoax.):
UPDATE: Steve Sailer has done some research.
There are a lot of flakey and potentially dangerous people out there, so perhaps it would be prudent for the Respectable Media to tone down the Trump Is Hitler rhetoric before something permanent happens, like it did to immigration restrictionist Dutch PM candidate Pim Fortuyn in 2002. But, you know, Fortuyn had it coming.