There are a lot of Pastors that don't participate during the worship, and that is sad. I travel to other churches a lot during the week and I see it. My Pastor, however, used to be a worship leader, so he already has the heart of a worshiper. Any MOM that has a Pastor that worships should be thankful. As far as for your Pastor that doesn't worship, pray for him and let God take care of it. Pray that God will invade Him with a passion to worship. Then, stand back and see what happens!
You be blessed and encouraged! You may be set in that house to help change the atmosphere!