@SersioulycanitgetWORSE Yes, same issue. Being bullied for a lifetime does terrible things! We found counselling really helpful - DH is surprisingly assertive and together now.
"Look. If you found yourself working beside a woman from a completely different generation, background and life experience to you, would you expect to be best friends?"
Actually, this has happened to me and yes we were friends. The fact that she treated me as an equal and didn't tell me constantly how to live my life, or treat me like a 9 year old really helped me to like her, you know? Her (much younger) partner was cheating on her at the time, and we went on a 'stakeout' together where we pretended to be Thelma and Louise to catch him out. It was the oddest mixture of very comic, and also very sad because he was an absolute rotter to her.
Your constant assumption that those who dislike their MILs are intolerant bitches is wearing. Accept that there are a huge variety of experiences on this planet, and a huge variety of people. Some are nice, some are awful people. Some are supportive, loving and caring, others are the very reverse. There are DILs and MILs at both ends of that spectrum, and everywhere inbetween. A decent, good person will make allowances, will tolerate a lot for the sake of peace. But there comes a point when asking someone to do that in the face of very damaging behaviour is cruel, and steps need to be taken to shore up boundaries or to avoid contact altogether in the worst cases.