This seems inconsistent, coming from the administration of a president who is hyper-concerned about terrorism and tends to overstate the security implications of just about everything. Close the borders, but open the skies?
Close the borders to foreigners, open the skies to citizens, yes. Maybe there is an informative comparison of border policy to airspace policy, but it has yet to be written here. Otherwise it seems the two aren't very related
Engaging your argument... domestic terrorism / mass murder of citizens by citizens is quite real.