The thing is I don't believe that legalizing drugs will end with the cartels/violence.

At least in México the whole concept of "war on drugs" could be better referred to as "war on drug dealers".

I believe that people should be free to do *everything* they want as long as they don't hurt others. Prohibition is bad but regulation is needed, not every recreational drug can be legal because there are some drugs that are extremely dangerous; the same way that not all legal drugs (drugstore ones) are approved because some are dangerous not all recreational drugs can be approved. So if not all drugs get approved we'll end up with some illegal ones and there will be a black market the same as today.

I think some drugs as marihuana should be legal because people should have the liberty to choose how the want to party, bear the pain of their illness or simply relax.

Legalizing some drugs won't stop the black market so a "war on drug dealers" is needed.

Also removing their revenue source seems like a good solutions but they will find another revenue source because they're not exclusively drug dealers, they're criminals and they can do other things as kidnapping, stealing and such. This is why we have to fight them.