I also grew up with an alcoholic father. Left home at 18 because of him. We have a decent relationship now that we are older but he can still stir up those childhood feelings within an instant. But my Crohn's did not show up until sometime in the last 5 years and I'm, well - past the 50 mark.
But - I've had irritable bowel from childhood. I could blame that on poor Dad. And my hubby is a moody kind of guy - guess my kids could blame him for their problems... wait - isn't that what we all have to learn not to do as adults - blame our parents for all our problems? I get better results dealing with my IB by learning to handle all kinds of stress - not just my imperfect father.