You're getting downvoted because you're failing to see the bigger picture here, in much the same way journalists deciding "even if we got handed this by the russians, it's true, so we should publish it" is missing the bigger picture.
Not to say that we shouldn't seek justice against these people, but that blindly making good local decisions may not end up with good global decisions.
Well wouldn't the reverse also be just as bad and exploitable? The classic is 'ignore misconduct because it might help 'the enemy' make us look bad' is in itself failing to see the big picture and one of the oldest ones in the book for the wicked to retain power.
The proper solution morally of course is to reject false-dichotomies and oppose wrong on all sides - especially within 'your own'.
You're right, "ignore misconduct because it might help 'the enemy' make us look bad" has its own downsides, but the answer isn't "who cares who it hurts".
There are many ways to deal with misconduct - letting adversaries weaponize information against your own at a time they choose with no care for the implications is probably not the best way.