> When Merkel decided to welcome one million refugees on german soil, it was about domestic politics?

No, that was about personal revenge for the press eviscerating her and calling her the "Ice Queen"[1] after an interview segment was shown on TV in which Merkel can be seen rejecting a refugee girl's teary-eyed plead to bend the asylum law solely for her.

[1] https://pbs.twimg.com/media/CKBa2VvUMAE1Ymv?format=jpg&name=...

[2] https://www.aljazeera.com/opinions/2015/7/29/a-refugees-hope...