Looking for advice. Growing up I always knew my Dad found some aspects of his relationship with his parents difficult, particularly his Dad. Over the years these feelings have grown progressively stronger, his Mum died relatively young and he has some resentment about the circumstances, he also now seems to spend a lot of time dwelling on his childhood / young adulthood and feelings that he was mistreated. His siblings don't share this view, they believe they had a generally happy childhood so this has now meant he has also fallen out with them as they defend his parents.
I don't know really who is 'right' about their childhood, his Dad can definitely be difficult and his Mum suffered with her mental health so I am sure there were difficult aspects, but also he seems so angry and bitter that sometimes he sees malicious intent in actions from his family that from the outside seem neutral / well intentioned.
I would like to keep out of it but he / my Mum talk to me about it more and more and I feel dragged into it (although they say they want me to keep out of it I can tell they don't like me spending time with the family and bad mouth them all the time). Also I love them and this seems to be making them unhappy. Is there anything I can do that won't make things worse?