The way I read your description of how it all went down, the guy was an inconsiderate a-hole and an embarrassment to his mother. If you approached him as cordially as you say, he should have gotten up and walked over to his camera with you then adjusted the height so you could see. Then, he should have offered to let you swap his card for yours so you could take a few pix. You could leave with your card and a nice souvenir of the encounter. Instead, he was just an a-hole and I hope he gets chigger bites.