I think the main reason is the guns being smuggled in (supposedly, mainly from Hati & Columbia). That with them seemingly imitating shit they see American rappers, claim to do, got everyone trying to prove how gangsta they are.
A couple years ago one of my Aunt's was telling us about a shooting that happened in our town. Keep in mind my fam is from a town deep in the country, up in the mountains, so stuff like that doesn't happen. Some guys got in an argument at a lil bar/club they have where mainly young people hang out, they left, came back with a gun and shot the place up killing someone and I believe wounding a few other (i dont 100% remember the details).
After that my other Aunt went to Jamaica to visit and stayed in the town for a few days. When she came back, she told me it really is different up there. Any sorta argument someone young gets into, they start talking about how they got that hot iron and they'll go get it and come back, smh.
I really think the only way to curb some of this down is if they really put a stop to the illegal guns being smuggled in.