Says a guy who's in no position of power and is happy to sit back and dictate what people should do in far fetched situations he understands little of.
'hurrrr he needs to sacrifice himself because I think it's righteous'
I agree mostly with your message, however, a city mayor cannot dictate policy and procedure to any federal entity. They would also likely be opening themselves up to all sorts of liability, i.e. lawsuits for arresting a federal agent. Worst case scenario is CPD getting into a shootout with ICE.
Now unfortunately, before you ask and I'm sure you've been pondering it, I don't have a lot of answers for you in what they should do. It'd basically be career suicide for most of these people in power and while I do agree it's the noble thing to do, it's also not necessarily intelligent to offer yourself up on a platter and most certainly be replaced with a pro Trump puppet once you're removed.
America certainly has itself in a pickle. Good luck
There are no longer any rules?
Then why the fuck are you all sitting around watching?