Should have declared the Turk ambassador persona non grata and kicked his rear in out. Unfortunately, we need Turkey in the struggle against ISIS, access to the Black Sea (peacefully) and as a counter to the Persians. Erdogan is thug. Unfortunately, realpolitik is an ugly, but necessary thing.
I'd still like to know who the protesters were, where they came from, and how they got permission, if they did, to protest. The reports are very vague about that. "A few Americans" in the crowd is all I've managed to find out, yet people are taking it as they were all Americans.