So, to summarize: He's a far-right extremist from abroad. His agenda is to promote the deportation of foreigners from Germany and keeping foreigners out of Germany. The government officials found out about him and grant his wish by banning him - a foreigner - from entering Germany. And now he's mad, because... They did as he told them?
Play stupid games, win stupid prizes.
Edit: I see what you did there !europe@feddit.de...