Well, I'm actually from Germany...
Martin Sellner is far right and parts of AfD are also far right.
Let's assume, he forces you out of the country, because you "don't integrate well enough"...
And then, what?
If you asked him, he'd tell you that the LGBT community hurts tradition and therefore is not integrated enough. He'd probably tell you about the "Homo lobby that destroys the country" or similar shit...
He'd probably create a new enemy, probably a religion.
Also worth to mention: Who decides, who is not integrated enough? There are already laws to send criminals away under conditions.
Those people, especially Sellner are people you don't want to be in power. Repairing what they'd destroy would take decades.