The hair thing sounds like it's related to how much work black people (especially women) are expected to do to keep their hair under control and styled instead of letting it look natural. Ohhhh, I know. You should've seen the looks I got for walking out in the rain without an umbrella after church. I never carry one... I don't use any products on my hair, and I figure "If it gets wet, it'll get dry." I said that exactly once, and was pulled aside later and told it was improper/unfeeling to say.
I've seen that film, and it is a very good one.