You are mixing casual relationships. GPS was jammed because of the Ukrainian drone attack, it's a standard electronic warfare countermeasure and civilian planes are well equipped to fly without relying on GPS. And it's perfectly reasonable to close airports when you have a drone attack in the vicinity (e.g. it's done regularly in Moscow airports).
You can easily verify that the jamming has started _before_ the plane started to lose altitude. In the first place, your scenario makes little sense, since its useless to cover things with jamming while this cover will be immediately blown up by inspecting the black box records. And wouldn't it be better to land the plane on your territory for anyone attempting a cover up?
It’s never reasonable to close an airport to an airplane experiencing an emergency. It’s not something that’s done. At most, ATC might advise against it if something makes it outright dangerous to land there, but the decision ultimately rests with the pilot.
The airport wasn’t exactly closed. Due to weather conditions they simply couldn’t do visual approach. There was no ILS and GPS was jammed, so they had to be diverted. And after they were hit it was too dangerous to use any nearby airport in the mountain zone, even if the weather was fine (they checked Mahachkala and decided against it). Aktau was a really good choice.
Yeah, it was a good choice. Aktau is surrounded by hundreds of kilometers of a really flat half-desert. Had they been able to land at even remotely correct orientation, they could have landed almost anywhere in that general area and would have likely been fine.
You can easily verify that the jamming has started _before_ the plane started to lose altitude. In the first place, your scenario makes little sense, since its useless to cover things with jamming while this cover will be immediately blown up by inspecting the black box records. And wouldn't it be better to land the plane on your territory for anyone attempting a cover up?