In laws stealing baby from arms

My in-laws are awesome grandparents to my son but I feel like they are constantly overstepping boundaries. Today my son did NOT want to be held by anyone else but while I was holding him my father in law tried to grab him away. I know my son and I didn’t feel like it was appropriate so I stood my ground and didn’t let go this went on for a solid 30 seconds. I know my son wouldn’t have been comfortable and he just kept doing it. When he opened up a bit more a few minutes later I then gave him to my FIL. This happens every time I have my son around them. I feel like they don’t respect what he wants or our bond. My son is a mama’s boy and is always cuddling with me and if they see that they tell me to put him down or just straight up take him from me. I don’t know I’m just frustrated because I would never think of grabbing someone’s content baby from their mother without asking. What are your thoughts?