What I don't understand is to complain about or refuse to do things you morally object to and at the same time insist in keeping collecting a nice paycheck. You can't have both.
Yes, of course you can have both. Companies can and have been improved in their behaviour by employee protests, strikes, union bargaining, and other such measures.
I was empathetic with the initial walkout since it was addressing working conditions directly (covering up sexual harassment and forced arbitration).
Then the organizers of that action started agitating to change company direction regarding military contracts, censored search engines, and conservative people being on certain boards. While in general I have reservations about all those things, and think people should speak up about them, I don't think that organizing against general company direction should be protected in the same way labor organizing is.
At the same time, if your moral objections are strong enough, you should quit immediately. E.g. if your company says good news, everyone! We're opening concentration camps tomorrow!, I suppose the only reasonable action is to quit in disgust (as I said before, it's not like Google engineers are otherwise unemployable). If you stick around you're implicitly saying that your moral objections aren't that strong (at least not as strong as your desire to get a fat juicy paycheck), and sure, try to change from within, but keep it private and keep it civil, without biting the hand that is feeding you.