You seem to be willfully misinterpretating SpaceX's post. They say that only potable water is used in the deluge process. That's all they are saying. They aren't saying that the post deluge water is potable.
People are only concerned about the post deluge water.
Why does SpaceX repeatedly, and condescendingly, keep saying "Again, this is drinking water!"
So no, I don't think he's willfully misinterpreting SpaceX's post. In fact, I think SpaceX's repeated references to drinking water, at a non-problematic stage of the complaints, is willfully misleading.