The counter-intuitive sore spot of an INTJ is this: they value practical and efficient ways of getting things done more than they will ever value logical integrity in and of itself.
That is why INTJs can easily look like hypocrites when it comes to what they believe is right and what they do. Because what they believe is right is feelings that they aren't very in touch with, and they have no reason to make themselves behave in a manner that is consistent with these internal beliefs unless they are inherently a very ethically-motivated INTJ.