GO!! and aesop081:
I see your point regarding the t-shirts, but it has been my experience (one full tour with the Americans, IRF(L) HQ, SETAF validation and six US exercises) that the US public - in general - is only dimly aware of what Canada is or is not doing - FOX News aside. Most, even in the military, are quite surprised to find that we're not in Iraq. Wearing a Canadian Army t-shirt is unlikely to attract politically motivated attention. Rather, I suspect the "foreign" aspect came into play a tad - or maybe a few people were acting like a**es...
My perspective is thus:
I have never had a single negative comment from an American citizen about the CF in any context, military or otherwise. On the military side, I have had an American officer break down crying, thanking Canada for helping out (this was in 2002 and he was from New York), Marines coming up to shake my hand in Kabul and tons of war stories about Canadians they've met on various operations:
"I used to think Canada had a big army and that you guys were everywhere. Then I realized - it's the same guys every time!" (25th ID Major, Bagram 2005)
The Major was obviously joking, but he'd been in Somalia and worked with us there, as well as in the Balkans and the Gulf. We're quite highly thought of by those with whom we have served alongside with. The remainder who haven't seen many Canadians have been universally glad to see us there - even in tiny numbers and even while "avoiding" Iraq. There might be jokes ("Canada HAS an army?") but they're invariably good-natured.
In my experience, Americans tend to equate Iraq and Afghanistan and there is very little emotional difference between the two for them. I personally received an amazing reception in Ramstein in January - all because I was coming from (and returning to) "down range".
Finally, I will always remember staggering off the Airbus for an unscheduled stop in Keflavik Iceland after 20+ hours redeploying in February, only to be met by the USO Auxiliary, complete with snacks, gifts, music, "welcome home" posters and about 50 clapping, cheering people. All at zero notice on a stormy Saturday night. All but two of the people there were Americans, including the station commander.
Sorry for the war stories, but this pushes one of my buttons a tad.
Cheers,
Teddy