> If he was a pastor, he probably believed in an afterlife, hoping to be together with Sarah again?

Only if he thought she was in hell. A pastor would know that you can't commit suicide and enter heaven.

That's not biblical. Some Christians believe that, but it's not anywhere in the Bible. In fact Samson committed suicide and mass killing in his final act and Hebrews 11 tells us he is one of those in heaven.

I think not even all strains of Christianity have the concept of hell? Not sure, though. Also, doesn't god always forgive in the end? And overall, religion doesn't seem 100% logical anyway.