Google can and should do whatever the frick they want with their own business.
Telling them they should post something Eastery sounds very statist to me. "There are tons of Christians. Bow to your constituency!"
Meh. The whole War on Christianity is getting old. This was a conscious decision on their part. "There are tons of Christians. We aren't Christian, so let's give a big middle finger to them all by holding up a labor activist instead on their sacred holiday."
It's not that they can't do whatever they want, it's just that it's so typical of the mindset.