Now the election is over and everyone has decided that they really don't want to form a government with them, the agencies are suddenly allowed to state the obvious without potentially embarrassing their future bosses.
This has been cooking for a very long time (pretty much since the AfD was founded in 2013, and some federal chapters of the AfD (like the Thuringian AfD under Hoecke [1], the Saxon AfD [2]) and five 'AfD Youth' federal chapters already earned the 'extreme-right' classification before [3]. The news is only that now the entire AfD is classified as extreme-right (to nobody's surprise).
The AfD also isn't the first party which got the label, the AfD is just the latest reincarnation of the NPD (since the 1960s) and the so-called Republicans ('Die Republikaner') since the 1980s. There's also various smaller splinter-organizations which are more openly right-extremist than the AfD but at best play a minor role in municipal elections).
