Calling it a cult fits quite well. Like Trump supporters, AfD can do anything. They do a different style of politics? Sure, they aren’t like the “old parties”, their budget is projected to have a 2 billion deficit? But the “old parties” are increasing the debt as well. Arguments are bent beyond recognition. Facts don’t matter.
The term “pigeon chess” was coined for taking with AfD: while you comply to the strict rules of the game, the pigeon just randomly moves pieces, throwing some off, and shits on the board.