Ignorance and hatred are free. They're easy to make. They're easy to spread. They have no barrier of entry. They require nothing from the audience.
Knowledge takes time. It takes work. It requires understanding. It's usually gated behind a paywall, so that the people making it don't die, since they dedicate all their time to it. And can't be spread easily because of this.
This is why I was so excited for the likes of Steemit and Hive.
And yet.
Ignorance and hatred are still easier to spread, easier to make, easier to instill.