I have a brother that's slowly going inactive, mainly because My Dad is pushing him
so much about it, that He's doing more spiritual things than the rest of us, and He
doesn't even enjoy it!
My advice would be to give him some space, let him know his bounderies, if
He goes into bad habits, kindly tell him that they aren't good for him, and
when there are things like pancake breakfasts and stuff, he might go to those.
Then he might realize that this new ward isn't the same as he went to, people
aren't looking down on him, and he might come back.