“It doesn’t give them the right to kill people for being part of the MC just because they think they may be doing illegal things.”
Sure, but that’s not what happened. Police used lethal force to stop a violent gunfight in progress, which they have EVERY right to do.
Thank God they did too, before more people died.
“....before more people died.”
Assumption on your part. In reality more might have died, less might have died or the count would be the same.