Greta Christina look at the recent Jane Fonda-Ted Turner divorce. The turning point was Fonda’s sudden religious conversion, about which she said:

“My becoming a Christian upset him very much — for good reason. He’s my husband and I chose not to discuss it with him — because he would have talked me out of it. He’s a debating champion.”

As Greta put it, Fonda…

would rather get a divorce than allow my faith to be seriously questioned.
Or to put it another way:
I know that my faith probably doesn’t stand up to reason. I know that I could be argued out of it. But I still want to have it — even if it means divorcing my husband of ten years. I’d rather get the divorce than be convinced that my faith is mistaken. I’d rather get the divorce than even take a chance on being convinced that my faith is mistaken.