Do you think the US should stop developing military technology? I doubt it, and I doubt many Google employees do, either. I doubt they would be happy to live in a world where the U.S. has a weaker military than countries like China or Russia. I also doubt they would approve of throwing out our advanced targeting technology in favor of Vietnam-style carpet bombing.
They are uncomfortable with killing people even though a technologically-advanced military is probably a good thing. They are comfortable with tracking and manipulating millions of people even though it's definitely a bad thing. This is squeamishness, not morality.