Always starts as a peaceful protest

[Wasillaguy]

Originally Posted by icenine

Open carry. It would indeed facilitate an ambush since it is legal to walk around with an AR-15 in Texas. The killers don't even have to hide their weapons before they start shooting everyone...

I suppose you missed the reports that there WAS a protestor walking around with his AR-15. He was not executed by the cops when the shooting started. He voluntarily handed it over, and then was protected by the very police who were under attack.