I think they are a lot like the crowds you see whooping it up at professional wrestling events. I'm pretty sure most of those people are well aware that these are not "real" sporting events- the matches don't "make sense" in that connection; but they are, for these people, very entertaining (doesn't do anything for me, but to each their own). Same thing here, I suspect- Trump's crowds aren't there to be informed of policy or, really, even to hear about political distinctions. They are there purely for the entertainment value. And Trump knows this- when he says "is there anything like a Trump rally?" it's his tacit admission that he doesn't care any more than they do about such mundane things as policy, he's only there to give them a reason to whoop it up for the political equivalent of Hulk Hogan (or whoever). I don't think it's an accident that there is so much overlap between the professional wrestling and the Trump political worlds- they both strive only for fans, and don't require any more substance than that.