It's interesting to see how people have taken this.
BIL reacted to DH's "new" allergy/diet extremely defensively. All three of us were surprised he said anything like that at all, since it was completely unprompted in regards to the conversation, and with a "You stupid, I know you better than you!" tone of voice. DH's reply and tone were pretty mild considering. I didn't want to get into the underlying cause, as it might not be relevant, but maybe I should? There's been family drama recently that we thought prompted the statement, but it has nothing to do with food.
I just thought is was amusing enough to post. I guess that was pretty stupid, but if that wasn't the time to say those exact words, well, I don't know what would have been.