I am an Iranian CS student. I had a fully funded PhD admission at one of the US universities. I was admitted for the Fall 2016 semester. I am currently in Iran due to my visa not being issued despite the 7 months I have waited for it. I was able to defer my admission to Spring 2017 semester, but then _this_ happened. I am quite sure that I will never be able to attend this program. I had very high hopes for my future…
Also even if you got here, depending on where that uni is located, your problems would either be over or just getting worse. E.g. there are periodic waves of violence against foreign students (Japanese in the 80s/90s; Middle East and Sikhs (??) in 00s and 10s) in certain states.
Things do change. When we first came to the US we landed in D.C. and drove north to find a hotel. My parents would not have been allowed to stay in the same hotel in Virgina. But now I live in the States and don't worry about that. I worry about other things but do believe that things will change for the better. This reaction is the last gasp of the old people.