I get and don't get some people when it comes to moving snow around. Shit sucks in my neighborhood, queens NY. My neighbors don't shovel their cars out or they just shovel the snow in front of their house pretty much onto the car in front of their house. They do that despite having a small yard area they could shovel it into instead.
I have to park on the street so I do my best not to get plowed in, I always get plowed in. I have to shovel my car out and you bet that if i go anywhere, that spot is gone when I come home. My neighbors have no problem moving their car from the shitty spot they neglected to clear up to a nice neat spot I cleaned up, a little animosity there.
I was out clearing near my car earlier while my kids were outside and i noticed a car hovering. I wasn't going anywhere, but they were there ready to take my spot while there were plenty of spots, that just needed to be shoveled a little. I walked back to the house and they drove off.
This has little to do with what happened in PA, I assume it was a dispute on where to put the snow. Obviously murder suicide is way overboard and something else was clearly fucked in that guy's head. But I do understand snow removal can get intense.