There’s a lot of potential explanations: Evacuation of VIPs, lack of confidence in airport security, the necessary transit of defenders, chickens running around without their heads, etc.
Personally I think the most straightforward conclusion is that the russians were fleeing in a chaotic panic, which isn’t an entirely unexpected response when you’re subject to a surprise attack.
There’s a lot of potential explanations: Evacuation of VIPs, lack of confidence in airport security, the necessary transit of defenders, chickens running around without their heads, etc.
Personally I think the most straightforward conclusion is that the russians were fleeing in a chaotic panic, which isn’t an entirely unexpected response when you’re subject to a surprise attack.