Nothing to do with civil rights and or discrimination. This has everything to with keeping the homeland safe, and as such, is a lawful order. Using Trump's rhetoric and talking points to discredit the order certainly carries weight with like minded liberal thinkers(4th circuit), but in no way should it. My belief is that the SC will overturn the travel ban halt.
It's not about a perceived "principle" it is about the legality of the order. Quite simple.