From what I understand from the article they did remove the post because it violated policy. It appears to me he got banned after arguing with the moderator that it wasn’t a Nazi salute. My views aside, it was the person arguing the policies of the establishment shouldn’t exist that got him banned from the establishment, not the post itself.

Edit: I may have this wrong though, I didn’t try to investigate anything, the fact that he was bitching about it on X was enough for me to determine he wasn’t worth my time. (Yet here I am talking about it … damnit)