Trump always struck me as the kind of moron who didn't care what came out of his mouth so long as it got him attention. The frightening part is how many people are actually rallying behind the ridiculous things he's saying.
This bit here, it's almost a guarantee.
Just because your skin is a slightly different color doesn't mean you're a different race. It just means you live in a different climate.
He's a blunt plain spoken man, and yeah, of course he's riling up tension. Tension gets votes, once he's in office you'll notice he suddenly stops the sharp aggressive speeches.