I never heard of this before. I do know (and as I mentioned to you before) that MO contains an extremely broad range, and the most left side of MO is really OO even when they don’t use that term.
I wonder if it’s possible that the shul doesn’t realize what’s in the haftorah book. It could be that they don’t approve of everything in the Haftorah book; they just never paid that much attention to it. Or maybe in the context, the example you gave is not as bad as it sounds? Or maybe it is very problematic and you shouldn’t be davening in this shul? Those are the 3 possibilities I can think of.