I think is was wrong for them to lump IBS, Crohns and other digestive disorders together all in one. They are all Different and their treatments differ greatly.
That being said, I do honestly believe that a lot of diseases probably are caused by the foods we eat(or should I say, the toxins that are put in our foods), medications, and just the environment we live in. Or at least I think it adds to it. Lets face it, these diseases were not as wide spread as they are now. More and more people are coming down with these debilitating diseases. There has to be a reason for it. The one big thing that has been on the rise is the making of more and more medications, adding Toxins to foods that we eat, and just living in a more toxic environment. Not to say these things alone cause crohns or UC etc.. just that I think it can bring it out of the box in someone who is vulnerable. I know I have been having issues for over two years. One thing that I have done is take lots of antibiotics for another debilitating health issue I have. I believe that antibiotics can play a HUGE role in setting one up for IBD and other gut issues.
In any event, this article should NEVER Have linked IBS and IBD and other gut issues in one big lump. They are totally different diseases. And actually, IBS in my opinion is Not really a disease. It just a way for the doctor to say " hey, your gut is a wreck, but we have no clue what is wrong with you". Either they do tests and cannot find anything( or they did not evaluate you efficiently), and you are sent home with no diagnosis.