The planes diverting were downrange. Also, I doubt they had much information to go off, and were essentially flying blind about where the debris were unless they had a direct line to NORAD.
Do you have a better explanation why they are doing donuts over the pacific at the time of reentry, then were diverted?
The ATC is up on YouTube - I heard it on the vatsim channel. ATC would not let pilots transit the designated danger airspace without declaring an emergency. So they did.
I don't have. Maybe they were indeed diverted because people got scared? Still seems pointless given the distances involved. Most reports are coming from social media / people watching flightradar24, and news media is just picking those up.