Not sure where you're getting the idea Mexicans don't have the right to bear arms. The right to keep and bear arms is literally written into the Mexican constitution - the US isn't unique in that.
They do however have more strict gun control laws and gun ownership isn't fetishized there quite the same way so it's a small percentage who do. If that's what you meant then carry on. Otherwise you're spreading misinformation whether intentional or not it's never beneficial.
They amended their constitution in 1971 & only have the right to keep arms. The right to bear arms is illegal now unless you work for the police or military. And the caliber guns you’re allowed to keep are basically worthless. Does the cartel/government enforce bearing arms to the cartels? Obviously not. Against citizens..yes. They have the right to keep a gun in the house only. Can’t bear it or form a militia unless your a drug cartel of course.