While ostriches don't actually bury their heads in the sand, most people do. At least figuratively.
It's much more socially acceptable to bury your head in the sand than to speak up and say "No, this isn't right. Good people don't support this!"
How do I know? Because I live it.
No, I don't go around handing out unsolicited advice. Usually. But there are lots of things I won't condone when it seems everyone else is on board with it. Refusing to support these activities or people doesn't do much for one's social standing.
At least almost no one ever asks me to praise kinderprison staff, "the troops", or law enforcers anymore. Almost no one ever tries to convince me of the usefulness of a "law" these days, or why more are needed. And that's a good thing as far as I'm concerned.