Earlier quoted context omitted.
Some of their ex-members have been literal Nazis. Something that doesn't go over very well in Germany. The party banned these people but their standpoints are still very controversial, the main issue is that in some aspects they do no support the juridical system. So yeah, regular right wing compared to American standards but I think we can all agree that respecting the trias politica is a good thing in any country.
I’ll be honest, as an American looking in from the outside, this looks like the leftist parties in Germany trying to silence the opposition. If the party is expelling the true extremists like the Neo-Nazi former party members that you mentioned, I don’t see why they should be held responsible for them. This would be like declaring the entire American Republican Party extreme-far right because of a few whack jobs like…
Germany has a wide range of political parties that cover the entire political spectrum. A party of extremists is not needed for a strong opposition. What German politics needs is momentum, and the will to actually get stuff done, even if it'll be unpopular. The fact that the AfD managed to use and abuse that mindset to gain popularity does not make them the right ones to make a positive impact. In fact, even putting their extremism aside, their contrarian and anti-progressive "everything new is woke" mentality is the exact opposite of what the country needs, for all I care.
I've answered your last question in a sibling comment to yours.[1]