Although in almost every circumstance outside of Crohns it's different, WITH Crohns, I'd say that usually, processed/refined flour is actually a good idea, as the higher fiber, less milled grains/flour is harder on the bowels due to extra processing needed, as well as bloating fiber....
I haven't noticed one way or the other with red meat being bad or good, it's been very neutral for me, but if you don't normally avoid red meat in the first place (like Hippie or Colt) I see no reason to keep _lean_ red meat off the menu....a family friend of my gf's, a guy who had Crohns issues long ago (remission now for like 10 years going) just before Remicade was used on him, actually ate lots of plain McDonalds hamburgers (which I'll admit are simply 100% beef), no toppings or anything...and that was one of the only things his body would take, red meat and white bread. It's not lean red meat, so I don't think highly of it, but my point is everyone's different with this disease as we all know, so if it's a problem, avoid lean red meat, but otherwise, don't go out of your way assuming it or any food, is problematic without trying it. Some foods end up making one person feel better, not worse....(this isn't meant as a pro-beef industry paragraph, more like a "try a food first, problems arise then avoid it, if you feel no change or even feel better, eat a little more"...posting)