I'd not call this an over reaction. This part of the story, no matter how true, will be used to smear pot users in the future. People will look at the original

I'd not call this an over reaction. This part of the story, no matter how true, will be used to smear pot users in the future. People will look at the original drug as the cause when in reality there are probably many more possible things that could be associated with the cause. This sort of thing becomes played out after time. "It's not the person's fault! It's that they used this devil plant"