The whole judge not lest you be condemned thing, is it not okay to say hey this is a bad thing let's discuss how to get out of it? How is saying something wrong that is wrong confronting it and trying to fix it a problem with people? What the passage is talking about in the Bible when it talks about that is being a hypocrite. Don't tell people not to go steal and condem them when you're sitting there doing it too. Don't be a hypocrite get it? You can warn people.