@calsdad , I think you're onto something with your analysis. There's a huge "tell" in the altercation, and it comes at about 38 seconds in this video:
(CMR) A Pennsylvania man shot and killed his neighbors and then killed himself in a snow-removal dispute on Monday after a major storm dumped more than 30 inches of snow in parts of the United States. Jeffrey Spaide fatally shot his neighbors, James Goy and his wife, Lisa Goy, before killing...
caymanmarlroad.com
The shooter called the couple "scum", and the wife answered: "
You're the f***ing scumbag, you don't f***ing bother with no-one..."
Right there, she let out, probably without realizing it, one of the underlying factors behind all this. The deceased were probably pissed off at the guy (in part), because he "doesn't bother with anyone". They were pissed that he was a loner, and a successful loner (and perhaps not a member in good standing of the normal "neighborhood feelz/sewing circle BS"), and there could have been some real anger, insecurity, and jealousy issues on the part of the deceased.
Also my theory is that this was, tangibly anyway, probably mostly between the shooter and the dead husband. I'm thinking the wife probably didn't have much actual "tangible" involvement with arguments with the guy (her opinions of him notwithstanding), but when the shouting match started, she piled-on with her husband like a bully "bullying", and then the others present (in this case, the wife) "join in" on the abuse of the target. (Whereas the bystander/s normally would not have done so themselves).
Once the main bully starts bullying, it's okay for the others to pile-on. (I mean, whatever she thought of the guy, what are the chances she actually ever got into a dick-waving contest with the shooter?) It was probably between the shooter and the husband, mostly, for however long back their history goes.
My thinking: when the shooter popped her and said that she "should have kept her f***ing mouth shut", that leads me to believe that this was historically between the two men....and if she had just stayed off to the side and kept her piehole shut, she might have been spared.
Just a theory.
Also: I think the shooter was carrying all along. He retreated, but the neighbor pushing things, & calling him a pussy x3, was the last straw. Being called a pussy is where the guy cracked.