If you asked my MIL she would say ...
I am the DIL who forced her and FIL out of their home of 40 years when she had cancer, so I could live there myself with DP. They had to move their entire life from a large 6 bedroom house to a 2 bedroom bungalow with little notice and no time to pack properly at my instigation.
During this time I was rude and uncommunicative. I made things unnecessarily awkward and difficult
I then banned her and FIL from ever setting foot inside the house again. Even though lots of their belongings are still here because I didn't give them enough time to sort through them.
I would say... I can completely see how that version of events looks plausible from the outside and seems real to PIL and it makes me realise how there are always two sides to every story even if one or both of the parties feel the other is being extremely unreasonable.
I actually quite like my MIL, I'm genuinely sad that a very specific set of circumstances completely out of my control and largely out of her control have probably permanently damaged our relationship, which was previously very good. I'm trying hard to build bridges but it's difficult when she feels so wronged.