A 'right' in this context by definition means government (agencied) will not persecute you for the activity protected by this right. If that's not the case you don't have the right at all, period.
Note though, I do not agree with this particular right (that of bearing arms, visibly so, at a protest), but the so called right leaning people are very enamored by this one and were very vocal about it just yesterday. Suddenly those same people seem to be equivocating about it now.
The people who were supportive of bringing assault rifles to contentious public rallies are now falling over themselves to blame Alex Pretti.
Touching a 'police officer' had nothing to do with the killing. Had he touched his own behind the same thing could have transpired. What killed him is the political support for ICE to be beyond accountability and the license for violence.
In this atmosphere anyone killed by ICE is automatically a homegrown terrorist, if by nothing else, by presidential fiat.
In this specific case, considering the video evidence, I agree with you 100%. There was no valid no justifiable reason to murder that man.
I still think, in general, when going out looking for confrontation (whether that be against the police or even just a bar fight) that the firearms should be left at home.