Earlier quoted context omitted.
Erdogan has been a loose canon for a long time, and I suspect is only tolerated because of Turkey's precarious NATO membership.
No, because the EU's refugee deal with Turkey is paramount. Without it there are more refugees in Germany (and other "core" EU countries), and the tense political atmosphere tips over.
It is part of Turkey's strategy fill Europe with Muslims and them wanting to reinstate the Caliphate.