Facebook bans famous war photo because the screaming, napalmed child's genitals are offensive

Ditto.

Facebook isn’t an ISP, nor a monopoly. There are a million sites you can spout your opinions and post pics.

You can’t walk into a restaurant with no shoes. Some restaurants even require a dress code. Even grocery stores require shirts and shoes. None of these places are denying your ability to feed yourself, they just have some basic rules of conduct in order for you to acquire the food. Most places make you put on pants too.

Facebook owes you nothing.