It is typical of those who "fail to judge for fear of getting it wrong" or "are too weak to take drastic actions" and always come up with a positive judgment even towards people who have carried out evil actions.
In most cases the do-gooder is a controlled person. Very seldom is he/she a virgin at nourishing this attitude. In some cases he/she is an incognito manipulator disguised as a controlled person or a virgin at it in order to pass unnoticed.