That's what I thought too ... so I went back and checked the age of the video of the event and found it was right around the time he changed his affiliation to Republican and was contemplating running against Obama in 2012.
So .... was the whole birther issue ... a hot button issue that Trump was hoping to get enough steam out of and never got off the ground?? Or ... did Barry tick him off enough with his comments that he decided to show him ... that he was the Donald and Pope Tump!! As I have stated before ... Trump is no conservative. He didn't see enough opportunity in 2012 and he now saw an opportunity to tap into an angry electorate. He is simply playing on their hot issues. He is good at controlling (if not owning) the media and sold himself as a conservative and crucifies anyone that gets in his way. He is only interested in making this country into what will benefit Trump and make Trump great.