What in the ever loving fuck are you talking about? There's literally no proof this even happened the way it was stated. It's the word of the person being denied entry against the word of the customs officer, and somehow you think this has something to do with trump, or trump supporters?
Fact is, people from other nations do not have a RIGHT to travel to the US. Americans were blocked access to Canada for the purposes of attending a protest, it only makes sense Canadians and people from foreign states without visas were denied entry as well.
If you want to Trump bash, that's your right, but take it elsewhere. This thread isn't even remotely about Trump, it's about american border policies.