Assholes are too expensive
A more poetic treatment (under my supervision) would have been to reassign Damore to Google Day Care and halve his pay. (On slow days he'd be my ping pong ball boy and his days would be long.) But that's just my opinion, man.
Google wasn't too reactionary if they thought about Damore's bullshit longer than five minutes. Anybody who's lived longer than 30 years understands that ignorant assholes add higher costs to everything. Evidently, assholes in Silicon Valley are a dime per dozen so cost adjustments can always be justified one way or another.