With some people their mind is so programmed with the way they think it doesn't matter what they are told it won't change their thinking. Trying to get them to understand is like

. Ends up not being worth our effort & only makes us more angry at them.
My dad & my x-h were that way & just had to accept this was how they were..but also I kept my distance because of the frustration they created & anxiety in my. Thus why he is now my x also.
Most of the time it's not worth the effort or thr frustration. Spend time talking & expressing to people open to hearing & LEARNING.