He was placed in a cell before they found the Vance image. He also said the border guard didn’t like that image or an image of him with a wooden pipe.

I don’t doubt that it’s possible he was denied because of the Vance image and that in itself says something terrible about the current state of affairs.

But I think it’s more likely that he was stopped based on some other red flag like not having a return ticket and denied because of that.