Diversity to a liberal is a group of people who all look different, but believe in the same political philosophy. Anyone who holds different beliefs, no matter how they look, is considered an enemy. That is diversity to a liberal.
Correction: People who hate the same people you hate even through they hate you are considered friends to liberals.
The enenmy of my enemy is still my friend even if they would kill me in a dark alley or throw me off a tower....