And so you see. Democrats are not entirely "anti-guns". And every shooting is not alike.
The American "gun culture" set the stage to settle problems with guns (the root of the gun violence problem, imo), but the situation did support the Uber guy's actions of self defense.
“You never change things by fighting the existing reality.
To change something, build a new model that makes the old model obsolete.”
– R. Buckminster Fuller