>>215948272 (OP)
Mostly drugs, not that different from the rest of latin america. It's just that their cartels go a lot harder, even than ours.
Also, it's not like they're killing random people for no reason. You're good as long as you don't have any involvement with drugs or cartels.
In Brazil our cartels are pretty bad too, but on top of that, we also have way more petty crimes than mexico, like muggings and car theft.
I have been to CancΓΊn and I felt way more safe than on any brazilian beach.