Another way to put this might be to say that being the good guys is about what you do, not who you are.
This is why, despite the wretched, vile, but sadly-not-quite-inhuman acts of the al-Queda operative Bush chose not to pursue, so as not to distract from his desire to go to war with Iraq, we should continue to pursue the issue of the wretched, vile acts we have perpetrated.