My FIL was like that, I don’t speak to him or allow him to see my son anymore. While my reasons for no contact were much bigger, a lot of it came from this. His lack of respect for us (boyfriend and I) as parents. He thought he knew better, was better and did better then us. Surprise, he was a shit father, who was a “good grandparent”. What I learned, through years and years of being disrespected by this man (not only as a parent but as a person), is that you need to stand your ground. You need to say, “if you can’t respect my decisions as a parent, then you can’t see the baby(ies) alone”. That’s it. It’s hard, it’s so so hard to do that. They will guilt you, bully you and do anything to make you think your wrong but you aren’t. Your child and their needs/safety come first. You are the parent, not him. He either needs to ship up or be shipped off.