The context is US employees. The majority of employees are in the US
No it's not and no they aren't. Most Google employees and most Google revenues are outside the USA.
Name your country with a significant number of Google employees in which Google routinely hires people who do not speak an official language of that country, please.
Switzerland, as just one example.
Young people are working long hours, as you said yourself. Those young people are not staying, as the data confirms
Jesus christ, you're bad at this. The data doesn't say that. Google has very low attrition rates and always has. If all the young people were burning out and leaving the average age would be higher than it is, wouldn't it?
Google are low on gender, age, and race diversity compared to nearly every other tech company
You haven't shown that, or even begun to lay the groundwork for that. The demographics of Google engineering are pretty similar to the demographics of people taking CS courses at universities, which should not be surprising to anyone.
Like a few of my friends who walked away from the Google interview process, the moment I started hearing discussions of fitting into the "culture", I saw that it was a business comprised of smart but narrowminded techs who did not really know any better
All organisations have cultures, it's inherent to any group of people that's allowed to be selective. If you don't believe this then all that suggests to me is you work at a place where you fit in well enough that you don't recognise that there is a culture at all.