Earlier quoted context omitted.
Are ICE detentions legal? Is what ICE under the current administration behaving legally? The shooting an officer is the one crime, assuming the protestor wasn't shot at first. This administration has repeatedly lied about these sort of events, so I have a hard time believing the official account.
How is that relevant to my comment?
For example one may demonstrate to get a law changed, on the premise that they will not be shot on sight or otherwise extrajudically punished for assembling. Why would you expect entities of the state that behave illegally to engender an opposition to follow legal norms?
This is not new in America. 250 years ago the Declaration was preceded by the olive branch. To the people that founded this country, the distinction meant everything.