Cutting off Inlaw question

I have cut off my father in law due to continuously breaking boundaries when we became parents to our child. Thematically he still sees himself as the leader of our family and pushes his religion on us and our child after I have told him numerous times to stop. Everything he does my husband sees through rose colored lens but anything I do by enforcing boundaries is wrong.

Has anyone cut off an Inlaw or in-laws and the spouse hasn’t? With kids involved? How is this working out for you? For the last 6 months it’s been nothing but his dad constantly trying to weasel his way back in through poetic word smithed apologies and letters and no changed behavior.