Let's remove "anti green" and "anti immigration" (but not pure xenophobia) out of group 1, since you seem to protest those two as the most ambiguous (I do agree that those areas may be too blurry).

I also think you misinterpreted "authoritarianism for their group", or I expressed it poorly. I don't mean "support of authoritarian governments", but rather "give more power to their group over others, or favor keeping such a status quo", in the context of race, sexuality, gender, culture, etc.

Yes, group 2 may be protest voters, and their rationale is that the best protest against some leftist policies and monologue is to vote the right - not blank, not abstention, and not some void middle-ground. Of course!

But these people are not complete idiots that forgot what the AfD obviously stands for. Thus, I cannot reasonably believe that they ALL fall under NONE of the categories of 1.

My most generous concession would be 20%, but realistically I would say there is maybe at most 5% that is purely protest and not at least one of: racist, xenophobic, homophobic, misogynist.

Simply put: If someone claims they are not racist, and not homophobic, and not misogynist, yet they still vote for AfD, then they are more likely to be some of that, or are okay with the current status of discriminations, and not some naive idiot.

What you could say to change my mind, is how someone votes/supports AfD purely based on e.g. strengthened immigration policies for purely economical reasons, or "do not like greens", or "just wants nuclear". I don't understand how someone could be so oblivious to the other standpoints, but maybe this is just my personal bias?