Well I’m betting the cop who was killed was killed by a Lefty, not a Trump supporter, and certainly not by the retired firefighter (who threw a fire extinguisher, but didn’t kill anyone).
Here's the thing - he wasn't "killed" by anyone. He had a medical condition, just not being reported... yet.
And yeah - that fire extinguisher might as well have been a frisbee. The guy was a douche for throwing it, but it obviously didn't hurt anyone.