Plain and simple, it makes leftists feel they're more right. And makes them feel being emotional about it is better than not. Divisive approach when this film could have properly transcended left and right. Disappointed. This certainly doesn't help US politics even if I hoped it would.
Some of the other messages were good, relating to distraction.. but they don't offset the awful effect of leftist righteousness being encouraged
To clarify my comment - it'd be just as bad if it was rightists being encouraged to feel the same in another film type. Righteousness is dangerous when people generalise being right in one area, to them and their party likely being right in all areas...