At least in my country, we have come to accept the flags burning, but what we cannot accept is violence, burning of embassies and intimidations, and there is no excuse for that.
Remember, the American grand strategy works when other countries feel secure. But it doesn't work if we acquiesce in the aggression of other countries.
9/11 was a genuine trauma, and President George W. Bush rallied the country. I think the Iraq war was ill-considered, but there - it was done in the wake of a national trauma. And that the errors made under such circumstances are different than errors made in the cold.
Russia committed an act of aggression in Ukraine, and that's the first time since 1945 a European country has seized the territory of another European country. That's serious business. They started a war with their neighbor. Their troops as well as the separatists funded and controlled by Russia are killing people just about every day.
George W. Bush tried working with the Russians after 9/11; Obama had the reset. Both presidents achieved less than they wanted, but they both achieved something. Those policies made sense, and it's to the credit of both Presidents Bush and Obama that even as they reached out to Russia, they did not sacrifice core American interests, or core American values. We didn't give the Russians on the altar of better relations other countries. We were able to do two things at once.