I know this "bullying causes shooters" narrative is popular and makes some kind of intuitive sense, but do we have actual data on it? Is there even a correlatio

I know this "bullying causes shooters" narrative is popular and makes some kind of intuitive sense, but do we have actual data on it? Is there even a correlation? Because my memory of the last few months of shooters is that most of them didn't really experience bullying (though were definitely socially maladjusted). I want to emphasize that I am not suggesting bullying isn't a problem, regardless of its correlation or lack thereof.