I found this question / answer on another forum......
Although it was about the shutdown of the Veterans memorial, it is a question that has been discussed here from time to time. The general thought here is that some of the younger police and military would follow orders, but the majority would not. I don't think so any more.
"I guess this answers the question that many have asked: Will the police follow orders to confiscate guns or shoot their owners when it comes to that."
"Looks like following orders (even if they are plainly illegal) comes natural to a lot of people." ------ and not just Germans.