I'm a Jew, I find the parallels are very disturbing, right up to "it couldn't happen again."
It can, and it scares me, one of the reasons I'm glad I'm in Australia. I'm working on gathering enough data to ask for permanent residency. There is an option that allows for permanent residency without renouncing your citizenship, and since I receive Social Secuity and Medicare, I do not want to renounce my citzenship, and I would like to be able to travel to the U.S. without issues. Remember, I/we paid for those!
I'm told what would probably happen, I would go onto the limbo of a "Bridging Visa," that way the Australian goverment doesn't have to take a stand/position. That would not be a bad thing, protected from Trump and his followers, and free to travel as I choose. Sometimes limbo is good!
Our hope and dream is the Trump nighmare will be over soon, 2020 at the latest.