YouTube Arizona Daily Star - This is how mainstream media reported what happened.
YouTube - The Daily Spectator. This is a little more information and you get to see what the man's friend in the above video was wearing, a Klan hood.
In the second video you hear Donald Trump say there is a disgusting man in a Klan hood. Does that sound like he supports the Klan? If he thinks the Klan is disgusting and says so at his rally, why doesn't that make the news?