Before you sook about his email, remember you can pay a good twelve bucks to ship a shirt interstate let alone internationally, and know that odds are you're either costing them money, or at best making them like two pennies.
You could also make a shirt that protests his opinion. I won't, but that's only because I made a shirt that says (a friend's name) sucks doodles and I thought that was more relevant to my life than some geezer in the US's opinion about US politics.
Was just about to post this deal. Did you pay in AUD?