I deleted this answer because a user flagged it as rude of offensive. I decided that the flag was warranted because the answer is mostly an unsubstantiated allegation that "the left" would be willing to support a person who self-identifies as a neonazi because his anti-zionism appeals to them. This kind of rhetoric which generalizes and demonizes a mainstream political direction is toxic for this community. Either that, or the even more disturbing interpretation that the author sincerely considers anti-zionism to actually be a positive quality which outweighs fascist tendencies. But in dubio pro reo. Also note that the answer had a voting score of +0/-3 when I deleted it, so nothing of value was lost.
Now some might point to instances where similar rhetoric against "the right" is posted on this website. If you find some content offensive, flag it and we moderators will evaluate it. We do not read all the content posted on this website. If you don't flag content then you can not assume that we moderators endorse it.
Whether or not the user has a history of posting certain content should not matter for the evaluation of a single post. Each post should be judged in isolation. But I think it is understandable that we moderators take a closer look at content posted by users who caught our attention before.