So they don’t have SSRI in Europe where these shootings are rare?
SSRI drugs cause violent outburst, that is why the FDA placed the "black box" label on them in the first place.
The largest study performed was done in Sweden and it revealed that those on SSRI class drugs were 50% more likely to commit violent crimes, regardless of weapon, than others treated with other more effective treatments, or placebo. More importantly, those treated with the other methods, or with simple Placebo (sugar pills) had better overall recovery rates and faster average recovery times. AND THEY DIDN'T KILL PEOPLE.