Quoting from Damore's memo:
"Differences in distributions of traits between men and women may in part explain why we don't have 50% representation of women in tech and leadership."
"Discrimination to reach equal representation is unfair, divisive, and bad for business."
"I hope it’s clear that I'm not saying that diversity is bad"
He goes on to suggest "Non-discriminatory ways to reduce the gender gap" - by accommodating women's biological differences!
The rest of it is a (polite) rant against the SJW cult of Google. Dear God, it sounds like a horrible place to work! He was lucky to get fired before wasting another day of his life there.