Crafter_Man, I think you are trying to simplify some very complex matters, and force them into a “black or white” division that is inaccurate. Perhaps you should refrain from making judgements in areas where you lack sufficient knowledge to do so?
Your friend with the “Chinese Food allergy”, for example - you are failing to take into consideration the ‘many shades of gray’ that may apply to that situation.
Point 1) You said that your friend avoids Chinese food because of the MSG, yet eats other foods that contain it and appears to suffer no ill affects. Has it occurred to you that your friend may have a threshold of tolerance for MSG? Perhaps the small amounts present in most prepared foods doesn’t trigger a reaction, but the amount found in a typical restaurant-prepared or supermarket-packaged Chinese dish exceeds her tolerance.
Point 2) Perhaps your friend is sensitive to some other ingredient in Chinese dishes, but wrongly assumes it is the MSG because MSG is commonly blamed for unpleasant reactions.
Point 3) Even if your friend imagines that she has this sensitivity, if she is experiencing some sort of symptoms after eating Chinese food then the distress/discomfort is real, whether it originates in her mind or her digestive tract. She could spend time and money undergoing whatever medical tests are necessary to ascertain whether or not her condition is “real”, and if it is not she can then enter psychotherapy and learn to change her attitude toward Chinese food. But, if she seems to be functioning well otherwise, this seems, to me, to be a little excessive when she can easily deal with the problem by avoiding Chinese food.
Of course, I would recommend therapy anyway, because she might want to learn why she tolerates ‘friends’ such as you, who chose to go behind her back and deride her mental health in front of strangers on a public message board.
You might consider therapy yourself, as your display of know-it-all arrogance, black-or-white thinking, and desire to degrade others for their supposed ‘inferiority’ is indicative of some less-than-healthy mental attitudes on your part. I suspect that these attitudes cause you many more problems in your life than your friend’s aversion to Chinese food does in hers.