How this is happening, the exact trajectory of how much worse these things are (and its potential to worsen) is somewhat terrifying, especially when you consider the cavalier disregard and easy ignorance that this policy represents. I know classmates and colleagues and friends who are discussing, in their groups and communities, how to best help people stranded, whether or not vacations and returns to see ill family…
That's the intention. The USA is more than a convenient incubator for foreigners. It's a nation responsible for its own future. Quite a lot of Americans don't want foreigners to make plans expecting that the USA will just always be there to fulfill their whims.
A little unpredictability goes a long way in changing your national reputation as an easily exploited doormat.