I think you misread the comment you're replying to.
> The alcohol wasnt what made beer safe. Beer was safer than water because to make bear one must use sterile water. So beer at least started out sterile/boiled before it went into the barrel.
AFAICS you're agreeing with this, so "complete and utter nonsense" seems a bit harsh
This was the part I was referring to: "Beer was safer than water because to make bear one must use sterile water."
I agree I should have quoted that to be clearer.