Please explain the reasoning behind your comment. Perhaps you are confusing Jimmy Stewart with some other actor; I’ve always thought Jimmy Stewart was a saint on many levels, and I’ve never read or heard anything to suggest otherwise.
Well, I’ll have to admit that my evidence is no more compelling that Wikipedia, which another poster suggested I read concerning Stewart. There are multiple sites on the interweb that relate a story pertaining to the fact that while filming “Destry Rides Again”, Stewart, during an extramarital affair, impregnated, and then coerced, Marlene Dietrich to have a clinical abortion for their careers sake.