Should I accept friend request on social media

I need advice and your opinion!

Should my husband accept my MIL, SIL & BIL friend requests on Facebook etc.

My inlaws have excluded and disowned my husband because of me. My husband and I got married and none of the siblings attended our wedding because they were too stubborn to reconcile with us as we asked for this before our wedding. They didn't respond to our request so we proceeded with our wedding plans anyway. Because our happiness doesn't revolve around them.

My inlaws only sent friend requests on Facebook to my husband but no one tried to contact me or add me. My husband has not accepted the request because I told him not to. Am I wrong to say that? Should he accept it? Should he reconnect with them?

My inlaws don't like me because I'm a threat to them. My husband has always bowed down to them and when I came into the picture, they no longer had a punching bag.