Wow, that is rude. I understand that food bans aren't entirely a good thing, for many reasons, and not always appropriate or necessary, but there are a few times and places where they are beneficial - and I think aircraft would qualify for some allergens. Often, people who outlash like this have never experienced the allergy life, yet alone a reaction to trace amounts. I can only assume this organisation lacks education in the matter, or only wants to believe information in their favour, as their website also has heavily swayed allergy information. At least they mentioned some reputable allergy organisations, that's good.
Bitterness brews ugly situations. I hope someday there will be more mutual respect and understanding between manufacturers and people with allergies.