"Trump hasn't started openly killing anyone yet, but then most Germans didn't know about the death camps in the 1930s and 1940s until it was too late. The threat here is no exaggeration."
Give him time. He will. Probably when the impossible logistics of deportation become obvious. He's vindictive, vengeful and malicious, he enjoys vicarious cruelty.
The worst part; Germany was not the world hegemon. This time round will be far worse.