Nobody knows why Stefanini was rejected by the Vatican. It may have had nothing to do with his predilections and it may have had nothing to do with him.

However, if the Vatican simply decided it would be inappropriate to have an ambassador who simultaneously calls himself a Catholic and suggests he thinks acts of grave depravity should be condoned, it would not be surprising.

To my knowledge, Callista Gingrich is not in favor of legalizing polygamy and has never suggested that adultery is not morally wrong.