Some Google employees made a website. I would summarize their three objections as follows:
1) helping out border patrol and immigration with data
2) helping the fossil fuel industry with machine learning
3) doing (and publicly asking for more) mercenary work
I think these are also valid reasons to leave Google as a customer.
@jautero @mplammers of course it is. Google profits from #surveillanceCapitalism, so it still profits from you even if you don't pay #Google a dime. Data is worth more than oil now. The only way to not be part of the problem is to stop using all Google services including the gratis services.