> Would a religion-ist ban really be any more acceptable?
I don't really see religion as any more than personal/group belief; I understand America sees it differently, and privileges religious belief.
Is a religion-based ban more acceptable? yes, race is an immutable characteristic that does not determine or prescribe a persons actions or motivations - "religion" is a systems of belief that absolutely does.
> Neo-Nazis are not targeted under the law for being Neo-Nazis
If the metric for hate speech is guilt-by-association with acts of violence, any ideology that promotes violence is hate speech. Neo-Nazi ideology falls under this category, and I believe "refusing entry" has a lower bar then outright bans on freedom of expression.
> That is in no way comparable to targeting "Muslims"
The Muslim ban was so-called by Trumps opponents. The ban targeted specific countries, and was not an exhaustive list of all Muslim nations.
> The mistake you are making is to conflate the criminal act with the motivation for that act
I'm not sure they are so different. Thought-policing ones own citizens is chilling, but I'm less certain about doing the same to refuse entry - we already filter based on a persons character.