How do you know this? As far as we know Google was also used to spread misinformation by Russian entities in the elections [1]. Correct me if I'm wrong, but Google invented targeted advertising. Hell, this is the company that boasted about A/B testing shades of blue to earn themselves $200m [2].
Sidenote: Google doesn't have access to your social information or what you "like", which was the reason behind Google+ and the big push to integrate it with Gmail and Youtube. The fact Google failed to get the same breath of social and preference information Facebook has doesn't mean they're more concerned with privacy, it just means they were late to the game and failed.
Google is more zealous about keeping its data to its own though.
[1]: https://www.washingtonpost.com/news/the-switch/wp/2017/10/09...
[2]: https://www.theguardian.com/technology/2014/feb/05/why-googl...