It's a bit easier to have sympathy for the man who cheated on his wife. He may have shown poor judgment, but he didn't commit treason against his country.
On the philanderer, a name like David Haight is too good to be true. Regarding the spy, I read a couple of articles and parts of one of them made me think perhaps he is not now an active Mormon. I don't know if that is true or not.
A nagging thought behind both of these cases, and the LDS role in waterboarding and other forms of torture, is that Mormonism leaves people with compromised ethics. As most of us know, the church expects everyone to ignore doubts and obey leaders regardless of conscience. Moreover, it takes guts to leave such an all-encompassing cult.
There are a lot of people who think that leaving is more trouble than it is worth; they realize the church is false but decide to live a lie rather than risk ostracization. Once a person has made such a deal with the devil, as it were, there is not much moral foundation left.
Mormonism is all about ethical compromise. I think for a lot of people who remain in the church, active or inactive, moral ambiguity is greatest of Mormon legacies.