Earlier quoted context omitted.
Murder requires intent...
I'm comfortable assuming intent when someone discharges a kinetic weapon at a occupied vehicle. If the car was parked and they assumed it was unoccupied you might have a point. I wouldn't have any trouble believing there were more attempted murders on the part of the anti-union side, or that this example happened differently than described, but what was described was clearly a (successful) attempt to kill someone.
Is that the same as shooting a gun? ; )