I use the trail as a cyclist, walker, and grandpa with pre-adolescent grandsons. This weekend I rode about 70 trail miles and walked about 10. I experienced things from both directions, which is often informative.
It's a MUP, where M is multi. Bikes yield to everyone, by rule. Yield is an interesting word; it doesn't mean stop but it may require stopping. It includes yielding to a pedestrian standing in the middle of the path. Cyclists may think the space in front of them is theirs, but it's not.
I don't think it was Karen level, but it was unnecessary and fruitless. Ill will was created.