The history of the world is so full of 'unjustifiable' responses to provocation that it's hard to wrap one's mind around the total context of it all.

No...they shouldn't shoot people like that....and people ought to KNOW that when you protest and dare folks with guns, occasionally some idiot is going to fire.

(They shouldn't have shot into the crowd at Kent State Univ. in the US, either....but....)