It’s sadly somewhat common: https://en.wikipedia.org/wiki/List_of_airliner_shootdown_inc...

Russia/USSR does seem overrepresented here.

Sure, but who's most likely to have shot down this plane over Russian territory?

The russians.

> [...] a fighter jet was being smuggled to Gaddafi by hiding under a civilian aircraft [...]

Do you have any sources for that? The article you link does not seem to mention that theory.

That’s what I understood from a documentary, I think it was from Al Jeezira, a civilian was pointing that there was a double radar echo from the plane and it meant there were probably two planes on top of each other.

Sure the article mention a theory that Gaddafi was in a fighter jet, and the civilian plane was a collateral damage from a dogfight, but given the lack of information in the public space, both theories still have a lot of common points.

Yeah, definitely seems like a strange incident, but as far as I can tell there isn't any widely accepted theory for what exactly happened.