Honestly , you are projecting sexuality where there really is none. I have been growing up (except for the teen years, where everything is embarrassing) going to our ‘naturalist’ (FKK) lakes and beaches every summer, and there newer were such problems.
They already have a presence, and are shaping the politics of Germany indirectly. As our leading conservative party (and our socialdemocatric middle -left party to some extent) makes the same error as in US as trying to cater to those extremist views. Which is frightening as fuck, as more and more fascist views are being adopted and normalized