The venue I published in before dropping out of my PhD purposefully alternated between the US and international locations for these reasons. (Some folks would complain that Canada "didn't count", which would of course greatly offend the Canadians present.)

One prominent professor was screamed at, nearly tazed, and had their car torn apart because the CBP thought they were homeless, which would be amusing if this senior researcher had not been obviously traumatized by the experience.

I have heard terrible stories from Canadian academics for years through presidencies of "both sides", and I'm glad this story is getting the traction it deserves but we also need to be mindful we did not arrive at this moment overnight.