As mentioned before, plenty of people rape, murder, and steal while drunk on alcohol (without being on other drugs). We hold those people accountable for their crimes of aggression, but we don't criminalize all drinkers and we don't conduct a "war on alcohol." It should be the same with any substance.
Yes, I would have the same stance if that were to happen. Substance use/abuse/sales should not be criminalized, but acts of aggression such as murder, rape, theft, assault, etc. should be. Anyone who commits such acts should be dealt with accordingly, but people like the laundry lady who was recently victimized by government should be left alone. Government is the criminal, in her case.