In case you missed it, a Saudi guy rammed a Christmas market with his car. Killed 5 people including one kid. Press inferrung that he's an "islamist" but he's well known for being anti-Muslim and pro AfD.
Getting some real Reichstag fire vibes from this.
If you want to be conspiratorial, might as well make it the US. The FBI is known for instigating lonely men to commit suicide bombing through internet chatrooms, and the CIA could do the same overseas as well.
This would fit with the overall plan of the US wanting to destroy the German economy and its white supremacist dream of taking in white European immigrants as these countries sink into fascism. The goal wasn’t even to get AfD elected, it’s simply to create tension and destabilize the society.