Your description there of counting mass shootings regardless of whether the victims died or who did the shooting tells me a lot about what you value. You're not less dead or less injured if you're caught in the gunfire of a gang shooting or if your spouse murders you along with your family. Their actual goal though is to give the reader an accurate view of the level of gun violence in America. Mother Jones is intentionally discounting most gun violence. Why they do that I can only speculate, but they're obviously cherry picking, and so are you.
Mother Jones is attempting to track the phenomenon of spree shooters indiscriminately killing people in public places, which is what most people associate with the term "mass shooting".
You are the one talking out of both sides of your mouth, scolding people for supposedly not caring about caring about these 'lesser' mass shootings that add up to the big numbers that you are posting for internet points, while simultaneously talking out of the other side of your mouth about 'stochastic terrorism' and 'tacticool body armor and AR-15s' and 'do the police stop to think that she shooters look just like them' while discussing the very same numbers.
This is your post from the previous page:
I wonder if they ever ask themselves why the MF they just arrested for a mass shooting looks just like them and had a social media profile that looks very similar to their own and the people they hang out with.
in other words, using the 'spree killer' definition of mass shooting when it's convenient for a culture war football ( = internet points) out of one side of your mouth and out of the other side you are handwringing that Mother Jones doesn't care about minority teenagers shooting each other the way that you do.
So it sure looks like you want to use whatever definition gives you the most utility for culture war bullshit in the moment: you want to rage against the cops and the red team and for people to treat you like you're talking about spree shooters, but you also want to use a much more expansive definition to put up sensational numbers and scold people for not caring about victims as much as you.
For the record (once more), I think the red team is bad and I don't care one way or the other if everyone's guns get taken away. My earlier comment also stands: I'll believe that you actually care about these shooting deaths when you drop the culture war point-collecting and still post about it.