I'm sorry but your temp ban from that community imo is justified. The line between shitposting and trolling is quite fine. However sympathy for Neo-Nazism and blaming people who are pointing it out for why they support it is well beyond a reasonable shitpost. The Texit-style remark really is the part that is troll-like if you aren't serious, and if you are serious you absolutely are falling for Trump and his team's divisive rhetoric. I'll attempt to explain.
Not everyone who supports Trump is a Nick Fuentes character, of course. But denying the association is just deluding yourself. In order to establish a tolerant society we mustn't tolerate intolerance. Pushing racist, misogynist, xenophobic views is not something that can be "heard out", if you will. The thing is the right-wing media network attaches real problems and struggles that people have, to hating and blaming your neighbour for it. With Nazism that was blaming Jews for various economic and societal problems that Germans had. We must separate the problem from the hate to even discuss a solution, and identifying that to a person is one of the first steps. We cannot start at a position that entertains the hateful argument or association as legitimate, we start from what the problem actually is and that involves calling out and recognizing the hateful parts for what they are. That is why the Democrats are appealing to both progressive-lites, liberals and past Trump voters on the issues, while MAGA is all in on the conspiracy theories, fabricated stories, fear, division and hate-based politics.
Hopefully this helps with understanding a little.