Non-celiac gluten intolerance explained?

I have autoimmune issues which affect my gut. Well-meaning people keep telling me to cut out gluten because it’s unhealthy, causes inflammation and even autoimmune diseases on its own. I have been tested for celiac a few times (negative) and have no issues eating some foods with gluten. My diet is already extremely limited, so I did a little research and found a couple of interesting articles:
scientists-who-found-evidence-for-gluten-sensitivity-have-now-shown-it-doesn-t-exist.
https://www.sciencemag.org/news/2018/05/what-s-really-behind-gluten-sensitivity
The second article discusses studies that the actual culprit may be FODMAPs ... Read even more