Flying a drone within 1/2 mile of ICE vehicles, which may be unmarked, is illegal? You can be flying a drone and if an unmarked ICE vehicle drives close enough, without warning, you have now broken serious FAA laws? This isn’t the kind of restriction that gets passed when the people making the rules care about being fair or consistent. It’s a power grab.
This is par for the course for rules regarding law enforcement. A group of armed men bust down your door in the middle of the night without identifying themselves. They're aiming guns at you and your family. Are you allowed to fire on them with your legally owned firearm? The law says yes, but also that police are allowed to be those people knocking down the door and shoot you if you aim a gun at them. So if that happens, who is in the wrong? Courts have been dodging the question, but in practice the answer is that you're going to be killed and the police won't be liable. You can do everything right and law enforcement is allowed to arrest you, steal your shit, destroy your property, or kill you, and officially you're the criminal for perfectly normal and normally legal behavior.