haha the pun was great. I guess i've never really met anyone who has explicitly expressed that they were communists so I don't have any answer to that. I do however agree with the comment up top where it's not necessarily acceptable it's just in communist countries, they don't really have any kind of freedom to seek a different way of thinking and as for nazis, they clearly are living very freely and they've just chosen that kind of lifestyle.
I grew up in a 3rd world country, it's not a communist country but it's very very controlled by the government, whether we notice it or not. Growing up, there were only 2 channels we had on tv and both have their own pawn in the government and even the way we live, the soap operas dictate that, the way we believe in church, our entire society is Catholic.
I guess my answer to your question is, I don't think they're acceptable, it's more just the communists you're talking about aren't in the same environment you are in therefore there's not much exposure to them that we do with neo nazis. I mean they are in a controlled environment after all.
I tried to answer, lol.