Good question.
To be honest I don't exactly know. They hate foreigners, that one is certain (or at least non white foreigners). I also think that the rest of their political view is very conservative regarding family, educating the youth and the military (like in the "good" old days). In economics I think they want something like our social market economy but with stricter rules against exploitation.
I think that are the basics, but I'm really no expert in modern German far right parties so use this info at your own risk.