What in the world do the "homeless and mentally ill" have to do with legalizing reefer?
Absolutely nothing.
Regardless of what is legal or illegal, the homeless still won't give a crap about themselves and the mentally ill will still be crazy. A significant portion of both groups should be in jail for vagrancy, non payment of child support or violent acts, but we don't have the room because the jails are full of pot growers and smokers.
The war on drugs IS a personal attack on every individual American's liberty. The gummint is just honing its skill and developing its resources for when they come for your guns and Bibles. If you can't see that, you either haven't looked at the big picture or a blinded by self righteousness.
One could say the same about your own opinion.