By all means, try to change things from within, but keep it within. The moment you start leaking internal stuff, betraying the trust of your employer and your peers, you turn it into an us-vs-them situation, and I don't find it surprising that you end up suffering us-vs-them consequences.

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.