It's not illegal to track law enforcement, but if any of their still visible chats show intent it will hurt them. They'll also want to find out how many people in the group chat are outside of the US, if any money was being exchanged, etc.
Hopefully they can unwind these groups, because it's just pitting people against law enforcement who have no idea what they're up against. They don't seem to have a sense for when they have gone beyond protesting and have broken the law. There's this culture about them, like protesting means they are immune to law.
If this all ties back to funded groups who are then misinforming these people about how they should behave to increase the chance of escalatory events with the knowledge that it will increase the chance of these inflammatory political highlights to maximize rage, it won't surprise me.
If they want to follow ICE around and protest them, fine, but that's not what they're doing. These people are standing or parking their cars in front of their vehicles and blocking them. They'll also stand in front of the street exits to prevents their vehicles from leaving parking lots and so on. They refuse to move, so they have to be removed by force, because they are breaking the law. Some people are just trying to get arrested to waste ICE's time, and it's particularly bad because Minneapolis police won't help ICE.
A lot of video recordings don't even start until AFTER they've already broken the law, so all you end up seeing is ICE reacting.
Any time someone dies, there'll have to be an investigation to sort out what happened. Maybe the ICE officer made a mistake, but let the evidence be presented. Being that this is Minneapolis, hopefully they do a better job than the George Floyd case. I absolutely recommend you watch the entire Fall of Minneapolis documentary to get a better sense for what the country may be increasingly up against in multiple states: https://www.youtube.com/watch?v=eFPi3EigjFA