Declaring that all the members, their friends and family members that happen to own a 20 gauge are all “STUPID” for making such a decision is a sophomoric comment at best. There are far more effective, constructive and intellectual means of “stirring the pot” without insulting people. Reacting negatively to being called stupid is normal, not touchy.
I would think that someone having spent twelve years in grade school while most of us only did six would present one with a large enough vocabulary that the use of the word stupid would be rendered unnecessary