Recently a group of journalists revealed that the AfD had a secret meeting with far-right extremist groups and neo-nazis where they made mass deportation plans for people with a migration background (even those born here with German nationality) which includes millions of people. That's what sparked the protests.

And the AfD is far more than anti islamic terrorism, they're hardcore islamophobic, antisemitic, queerphobic and ultranationalist. There's a reason one of their most prominent figures, Björn Höcke, is legally allowed to be called a fascist and a nazi.