I'm the Canadian who was detained by ICE for two weeks

If the objective is to scare people off from going to the USA, then they're doing a magnificent job. I've heard other cases of people with green cards being arrested and put in terrible conditions, with absolutely no reason given. This woman was ready to go back home and not enter the US, but instead she was dragged through hell and only released because she was Canadian. All those with different passports get subjected to their own more oppressive and never ending hells, like being deported to a prison camp in Ecuador with no idea when you'd ever be released.

New America is absolutely terrifying.

This whole situation -coupled with the outright bans or obstacles in giving visas to people from several countries- cannot but have unpredictable consequences. For example, right now, I cannot imagine any big academic international conference keep taking place in the US. And if they do, they should get boycotted. US right now is neither accessible nor safe for foreign citizens. And I bet recruiting or holding to highly skilled labour force will start being a problem too.