[ttepasse]

Only two parties have been banned in Germany's post-war history. Banning a party is a rightfully a huge hurdle, because it goes both ways: While it can be a part of a self-defence mechanism of democracy it is also a way in which Hitler & Co consolidated their power. Hence it can be only used after a ruling of the Constitutional Court – it is in a way a constitutional question.

> ... right away

Apart from the constitutional hurdles there is also the question of "right away": The AfD of the early 2010s is not the same party as today. Back then they were ... well cranky but not extreme. Banning it in 2013 would have been unjust. Over the decade it moved further and further to the right. Pretty much all the founders and bigwigs of the early generation left the party and distanced themselves from it. But radicalisation is a process not a binary switch from one day to the next.