Besides criminal conviction, those convicted of arson should have to do community service. They impair the ability of the church to hold its functions, and reduce the church's ability to donate time and money to local charities/help groups. Community service actually helps the community out instead of having the convicted individual sit behind bars all day using tax-payer's money. Having to work off some debt is good for criminals all around.
I believe a church arsonist should not only have to do community service but take part in the rebuilding of the structure they destroyed. This can be part of their rehabilitation and help them understand the effort it takes to create something. This will hopefully give them the perspective needed for rehabilitation.
Many people who are filtered through the justice system are given punishments that include community service. I actually think this is a very good policy and it does help society in some ways. For this reason, I think church arsonists should do community service to pay back their debt to society.
Yes, in addition to any jail time or fines that arsonists receive, they should also have to do community service to pay back their debt to society. They destroyed an institution that provides a lot of good and service to the community, so it is only right that they should act to repay the peopel they hurt.