Chicago gun violence is the fault of Indiana??

It's well known to exist and needs to be shut down. Blaming the neighbors won't do this. That's a cop-out and not good logic. If one's dog barks frantically and wakes up the neighborhood whenever the next door cat is allowed out, should the dog's owner blame the neighbor with the cat? Makes no sense to me.

the core of the problem.
The drugs see life in Trump's Mexico and Central America, with his actual scumbags.*
But the money comes from 'fine, upstanding citizens' who snort and inject for "recreational use" in American cities.
No demand, no market, no crime.
How to change the hearts of tje users?

* I think it's still true that poor people walk across the riverbed, but drugs fly across.

I'd suggest that, once addicted, use is no longer recreational. It's the addicted that likely bring in the most money and trigger the violence to acquire it. Drug use, by itself, claims only the user as its victim. They poison themselves to death...no gun involved unless they pull it to acquire money for (or to steal) drugs.

So what list of options have we to address both the supply and demand side? We can use educational resources to explain the harmful effects of drug use or we can threaten to use handcuffs on those who fail the educational process. So what's your plan to dry up the market? Some will think that, when you don't want a flood pour out on your property, you build a dike...or should I say levee..