Comment by karaterobot

Before making moral evaluations, it's really useful to look at these situations, and try to automatically reverse the "polarity" of the actors involved. If you see people doing something and you think they're on your side, imagine a similar scenario in which people are taking the same actions for a cause you are violently opposed to, or on behalf of a group you find deplorable. And vice versa. This helps reduce the chances you'll get confused and take a hypocritical position.