One thing that is misleading about the abbreviated Niemöller quote is that people didn't ignore the arrest of Communists because they weren't members of the Party themselves; they ignored it because they hated Communists.
At a time when "gang members", "illegal aliens" and "terrorists" are being deported, we have to remember that our compliance is being programmed by scare words. Naming Mahmoud Khalil an antisemite puts him outside of the law, where anything is permissible.