I find it interesting how there are always two "sides" at play in a discussion.
One "side" will go into autistic levels of depth\detail when explaining their point of view, and is eager to discuss and exchange thoughts and arguments.
And the other "side" absolutely refuses to engage with the actual point, and instead just repeatedly goes for personal attacks.
You can see this pattern in a ton of topics, like politics, sex, race, economics, 4chan vs tumblr/twitter, etc.
I guess it's related to how they view the world. One wants to find the truth, the other wants to berate and mock others until they automatically agree with them.