"People who use drugs are oxygen thieves that are a drag on society" Alcohol, tobacco, prescription medications are drugs and legal, they can effect a person health and ability to drive.
Seems you are unable to put up a reasonable argument so use a broad brush to dismiss the subject. You are being very narrow minded
I have shared joint's with people who are quite prominent business men, one of them smokes regularly and doesn't drink alcohol. They don't fit your idea that "People who use drugs are oxygen thieves that are a drag on society"