To be fair, there's a secondary problem here. If the POTUS speculates about a "treatment" that turns out to be dangerous then it's still other people's fault if they are stupid enough to take it seriously. It should be common sense that drinking, injecting oneself with, or washing one's hand's in bleach or similar products is just plain stupid. It's disappointing that Trump wondered aloud about it, but the people who took it seriously are the ones ultimately to blame.