FTR, I have read this ''memo''. Again, despite what the usual sites are saying, the guy is not ''proving'' anything. He is just spouting platitudes (example : LEFFTIES WANT TO PROTECT WEAK) without quotes or citations.
Viewpoint diversity is arguably the most important type of diversity and political orientation is one of the most fundamental and significant ways in which people view things differently.
I'm not an English speaker, but WTF it's supposed to means. ''Viewpoint diversity is important'' (okay...) because ''people view things differently'' ?