I´m guessing you are familiar with Germanys History, then you should know which party I am talking about when I say it is forbidden. This has not even to do with silencing a certain democratic Freedom, if we would allow this party to officially further their Agenda, it would be a disgrace to all the victims of the Holocaust.
My dad grew up in East Germany; and was there when they broke down the wall. He never mentioned any elimination of political dissent, his problem is that the current leading parties all together have a populistic agenda, that means, they often change what they stand for with every hype of the broader puplic, or with every bigger Event that changes the "main View" for awhile. Like I said, that is why the AfD, like many parties before it is posing as an oposing Party.
The AfD is also gainging traction because people are starting to be afraid of foreigners again, especially Refugees, which is easy seedground for Raccists, and believe me, thoose seeds are being thrown and are growing.
I don´t know taking in Refugees ever had a "before it was mainstream". Congratulations on handling a certain amont of refugees in the past.
We have an incredibly long and tedious vetting procress, that often takes up years, and that needs to be shortened down and simplified in order to allow for better and faster imigration. What is happening in Germany is certainly not a disgrace, and while there is some European Contries that are disgracefully showing a lot of racismn, like I said, I am not afraid for Germany, or all the Refugees living in our Country. I´d say we´re doing pretty good.
I know one country though, that has started many of the wars people are fleeing from now, and if I look at the 11 (eleven) Refugees the have taken in, I know who, at the moment, is acting with disgrace.