Plot Twist: Orion doesn't actually like the Faunus as a whole all that much.

This is actually true, Orion has a few issues with a certain group of Faunus that leaves him less than keen on the entire species. Almost as much as he dislikes bigots and arrogant people and stupid people and bullys and braggarts and bitches and...

...Orion dislikes a lot of people.