You know what would be inclusive? Acknowledging that not everybody is for Gay Marriage, and being OK with the Google home page celebrating something other than your pro-Gay Marriage ruling.
Personally I am barely a "believer" and don't oppose gay marriage but your argument made no sense. No doubt you can find people opposing Mandela, Mother Teresa and even Einstein, so no doodles for them to be inclusive?
I'd prefer mega corporations staying out of social issues. Produce social value by making great products, not political advocacy.
This is an issue of direct relevance to many of those that work at Google. I think it's fine for corporations to take a stand on social issues that directly affect their employees.
Einstein: https://www.google.com/doodles/albert-einsteins-124th-birthd...
You seem to be creating a mountain out of molehill. The design they have is targeted at certain searches - not on their main landing page.
During the holidays a holiday UI sometimes shows for [christmas] that has appropriate Christmas decorations