I don't get the "respectful parenting " stuff, I believe children need rules and routine, but I also believe they shouldn't be made to hug or kiss someone because they are a relative ( at the end of they say this is all you are) This post is conflictive, because while on one hand the views on "respectful parenting" are mainly negative , it really isn't any of your business how your daughter or son wish to raise their child- hugs or no hugs. I don't need to tell you it's not your child or chance to parent BUT your expectations have a lot to do with this. Everyone is different and your children who are now adults make their own decisions for themselves and decide how they want to raise their families and who they include when and where, I hate this phrase of "adult children" it implies adult in age but still children and this is wrong. Really you should be grateful for whatever time they choose to give you, everyone's lives are different, everyone's perceptions are different, but it's her life and her child, so if she doesn't want you to hug her child ( although I think is strange) just respect it as you would if it was your friend. Really your children who are now adults don't owe you for being good parents doing your duty- roof over head etc ( I understand there are people who take it all for granted and I don't agree) but I also don't understand estrangement and to be honest those who say they don't understand why they are estranged are lying- my mother isn't a saint, terrible childhood and alcoholic up bringing but if my husband said I couldn't see her again? He'd be spoken to- think of what you have done. Perception is different, what you think may not hurt, may hurt someone else a lot.
You see your grandchild once a week, way more than most modern day grans get, why don't you focus on giving your daughter a cuddle or just a chat over tea, instead of making demands over someone else's child ( yes she is your daughter, but her and her husband are independent adults with their own family and that child was concieved, grown and raised by someone who is not you, so it is someone else's child, and to get down to biology you are as related as their aunts/uncles/cousins- so you are all the same- no supremacy or superiority , plus people who live abroad or at a greater distance have a greater "friend family" than "blood family"- it's just what happens)
Apart from normal respect and courtesy you would give a stranger don't expect more from your adult sons or daughters , it's not fair. Stop having unrealistic expectations of people, tiny humans and people lives you can't control. Just be grateful for what you get, they owe you nothing and their children are in every right theirs and they choose by whom, when and where and how they will be loved. Accept, be happy and move on. Believe me, being demanding, expecting a relationship far different than that you have with the parents or that what the parents envisioned is going down the wrong ally- their life, their choices, their children.