Alienation of family is what brought me to these boards. When DH and I decided to start a family, I realized our troubled history with my IL's may get worse as we had kids, and I really would like to try and prevent that. Sometimes I talk to MIL and I get so angry. I think I'm able to handle her comments that I don't like because they're directed at me. But I know when it comes to my kids I'll have zero tolerance.
My wake up call was seeing my dad interact with my nephew. My BIL was at the house, (sisters husband) and my dad jokingly called my nephew a 'wimp.' BIL grimaced and rolled his eyes but didn't say anything. Everyone else in the room laughed (nephew was too little to understand) at a typical comment - joking comment - from my Dad. We're all used to his way of talking.
I thought to myself - if my Dad says that to my kid, I'd roll my eyes and explain to my child that grandpa's teasing and ignore him (or tease him back - that's how things work in my family's culture - a lot of teasing). But how would I react if FIL or MIL said the same thing to my kid? I knew right away. I would go nuts. Probably cut them off. But my dad would get only an eye roll.
When I realized what a massive double standard that was I started wondering why. Our history played a huge role - MIL has said a lot of things over the years to intentionally be mean - while my father has never said something insulting to my DH.
But when I started talking to MIL again after our three year cut off, I was determined to at least attempt a fresh start. Part of that was coming to forums like this, talking to MIL and reading their stories, trying to get their POV. I don't always agree, and sometimes no matter how hard I try I just don't understand 'the other side' of the argument. But I want my kids to have a good relationship with their grandparents, and I want them to see US having a good relationship with them, so I'll keep trying.