In my mind, the original travel ban was the key indicator of intent, perspective and bias.  Whether or not someone had ALREADY passed immigration litmus tests, they were banned from entering, even if already approved and holding entry or re-entry visas, IF THEY WERE OF A CERTAIN NATIONALITY.  They  were supsect because of their nationality.  Not becaue of conduct, not because of identifiable risk other than nationality.  It was and is purely about where they, or their ancestors hail(ed) from.  Worse, it was a politically expedient identification of certain nationalities.  Politically expedient for the time in history.  The political winds change.  The suspect nationalities of today could be in political power tomorrow and want to exclude YOUR nationality.  Or, the existing political power could just change or add to those lists of nationalities they want to exclude.  That is the danger.  That, America should not allow to happen under any set of rationales.