What part are you referring to when you say Eddie and Roland almost died because they were white? The fight with Detta?
Yeah, Detta with the hand cannon, Eddie trussed up and hog tied etc.
The whole build up to that is, in my eyes, integral to the story. Roland has pulled through a worthless junky, a character he despises. And Eddie despises him for it. But as they both have to work together keeping Detta in that chair and moving things change. Roland starts to see more of Eddie, his steel. It's the beginning of Eddie's growth and the beginning of Roland's acceptance of him as Roland is capable of less and less and Eddie pushes on and on.
We can't see that story on screen if it isn't dem pecker dicked Honky mafuckers against Odetta.
The Dark Tower series is my favourite series by far, so I'm going to have a dislike for any deviation from the story as it's written. It's been ingrained in my head how it was written for over a decade. There are lots of tiny pieces of the story that fit perfectly into the bigger picture.