@kaiarzheimer
Personally I think the "second pillar" is by far the most important, AfD isn't growing simply because they have good tactics...I don't know about the situation in Germany, but the experience in Sweden is that the dominant parties have no ambitious visions left: we are already at practically the best world one can hope for and it is all stewardship from here on, small wonder clear alternative visions are attractive...
To me the big question is why Greens aren't doing better