Number one predictor of correct or incorrect thing to eat: That you know good and well what's best for your body and how it will react! Harmony, if you have problems with something, that's just IT. To my knowledge, that study started with people who had no known diverticulitis at the beginning and then followed them. So in a way, that's not talking about you anyhow.
Another example of "know thyself" (smile) is HRH, who has spent a lifetime reaching for potatoes every time any digestive discomfort happened. Many times the conventional wisdom would say that's bad, don't eat those. Sometimes he would go along with it. But to this day, he will go into an attack of something (?) with pain and there is nothing so balancing to him as ordinary white potatoes, and any time he goes without them for a while he knows it. Btw, even after colonoscopy he has had no diagnosis that has "stuck", but two died-too-young first cousins had Chron's, one well studied. (The second refused doctors because of the experience of the first.)
He would agree with you on pineapple. That's out for him.
Back to seeds
Hemp seeds are little round healthy ones that are soft in the first place. Taste like peanuts to me. Wonder how that would be for you - better or worse? Another seed that's healthy and can be purchased already ground up to a fine powder is chia. Look those up and see what you think. I buy ground chia at Whole Foods and probably won't go back to whole - hard little things that some recipes say soak first. Ground flax or chia packages will say refrigerate after opening. So will hemp, although I don't think anybody bothers to grind it; it's so soft it would probably mush up.
It's been my experience that Bob's Red Mill ground flaxseed is more coarsely ground and (boxed) King Authur brand is finer ground. Maybe I imagine it, but it seems to me the golden flax tends to grind up finer than the brown - most people see no difference.
I feel discomfort after sunflower seeds, none after pumpkin seeds, even though they are similarly sized. This does at least tell me that there's a big difference in seeds. The Flat-Belly diet used to recommend eating sunflower seeds with applesauce every other day. I would be in misery afterwards, and it was one of the reasons I began to question the book.
Some people say they soak all nuts. Can't remember the reason. It's healthy to do that for some reason.
In my ignorance, I'll go ahead and tell you the 3 straight nut butters I keep on hand, not knowing if they would be good or bad. Coconut butter and almond butter I use in smoothies, and sesame butter I use in stir-fry sauce.