5 marriages… 100% Christian. No way to say it better.
Biblical christianity isn't for the perfect or righteous, but for sinners. Christ rejoices more over the one sinner that repents than the 99 who need no repentance (John 15).
I don't know much about Foreman. But, his fifth marriage did last 40 years. Seems like, at some point, his perspective on marriage/commitment got more aligned with biblical wisdom.
Christianity in America is like a brand - more about identity and affiliation than discipleship or doctrine.
I say this also as someone who's left the church, and whose religious parents and inlaws are multiply-divorced.