Many people enjoy discussing and judging the morals of characters in films, but that’s not the main point. Very few characters are entirely good or entirely evil, which tends to result in dull and poorly made movies. Regardless of whether viewers resonate with the story, they should show compassion for the characters. It’s important to interpret their motives and circumstances to understand what led them to make certain decisions and to reflect on ourselves.
This (supposedly unpopular) opinion could have used a couple of concrete examples.
I would go further still: it is generally a bad idea in life to evaluate people’s morals. Make clear what your own are, try to live up them, and leave it at that.
But that is another “unpopular” opinion altogether.