> tend to forbid gluten intake
They don't tend to. Any diet who doesn't absolutely forbid gluten intake doesn't work. Simple as that. Gluten is one of the primary factors of developing auto-immune diseases and ergo also treating them.
> whole grain
Yeah better. Totally :). Because as opposed to white bread, whole grain bread contains all the goodies of mother nature in full force, like all the poison these flowers made against mammals to survive digestion. Bon appetite!
> get cancer from all the anti imflammatory stuff.
Totally makes sense. Yeah, eat healthy and you get cancer. You really made my day :D. You are just randomly mixing totally unrelated research results into something that is utterly wrong.
Good luck on your journey!