But APA are no fools, doing nothing about this is equivalent to supporting it.
No. Play some Risk, the boardgame. You do not involve yourself in a two front war. In politics, you spend your energy on the more important issues. This is an issue that doesn't affect American citizens, however wrong it is, and considering the other issues such as the Affordable Care Act, mental health parity, shortage of psychiatrists, etc., this issue is not a priority IMHO for them.
I've never worked for the APA on a national level but have on a state-wide level. This is not something they'd likely put much attention towards nor does it even represent their constituency. This is more for the Canadian PA than our own. There are plenty of issues at each monthly meeting. They have to prioritize what are the battles worth fighting.
And this is more of a police/government issue. All the time in PES we see the police do the wrong thing, not so much because they intentionally are doing so but because they don't understand the mental health system. That happens everyday in almost every hospital with a PES to Americans.
As for foreign relations, I also don't think the governments will get involved here much either. Think about it. Think about the number of Americans being held in North Korea unjustifiably that America can't get out. You think they're going to worry about people that aren't even Americans? That's Canada's responsibility they'll likely think.
I'm not trying to make it out that what happened wasn't wrong, it was, but this is like someone going to a McDonald's, getting bad service, then going to to the pizza place and complaining at them to do something. It's not their responsibility.
If I were one of those Canadians being discriminated against, I'd call every single news agency in the US, the Canadian PA, and write letters to several people in the US and Canada such as the American embassy in Canada. A call to action on our parts? (Meaning the people here?) I got people discriminated against all the time that I work with and they are more immediate and more worthy of my attention. What I can do is contact the APA, and the politicians representing me all the way to the President, and as you likely know that'll not likely amount to anything.
It's not the psychiatrists blocking people as far as I can tell in this regard. It's the government doing so. The best the APA could likely do is tell the government to stop it in a very nice manner.