That's probably my buddy, don't bite ;)

I would argue the case that facebook is not malicious and promote disinformation. If their algorithm promotes comments that get lots of emojis and responses you would see the same behavior. I see it in many forums, the top comments are usually controversial.

Now add to that fact that all sites rely on web traffic to make money and you get a systems of incentives that breeds discontent and divisiveness. On top of all that high speed visual medium, such as the internet, produce an emotional response with little time to rationally process information.