"It's hard to explain things that seem perfectly obvious to you."

Perhaps that's why fights do break out, even here. Frustration because you can't communicate that which seems obvious to you can lead to aggression. And it's not necessarily the fault of the communicator OR the hearer, since the problem can lie in what each perceive as the meaning of the words used in the attempt to communicate.

There also has to be a willingness on the part of both the speaker and the listener to communicate in a meaningful way.

It's sad the ideologies and fixed ways of thinking seem to be breaking down communications between people more and more often.