KH is trying to be inflammatory. The article is stupid and the links she draws to terrorism are abhorrent.
But repeated daily fasts for long durations, where you're not allowed to drink (food not so much of an issue but water is), combined with very hot weather, are not a good idea, for anyone for whatever reason. I definitely wouldn't want to get in a taxi being driven by someone under these conditions, or be operated on or whatever. Nothing to do with religion, it's just that good hydration is important if you're making important decisions.