Mass shooters are the cause of relatively few deaths compared to the “accidental” or “spur of the moment” deaths the prevalence of guns in American households causes. I am not trying to downplay mass shootings, because they are absolutely loathsome and should be enough for any sensible person to realise that something is terribly wrong, but they tend to overshadow the much higher mortality rate which the prevalence of guns in the US are causing.
The US statistic of toddler shootings, as in toddlers shooting other persons, is above 0 each year. That alone is a pretty telling figure.