Yeah, the publicly available flight information shows it basically exploded wholesale in mid-air. That doesn't just happen with modern aircraft.
Redundant airplane systems protect against component failure, but they tend to still be near each other. For example, if an AA gun were to tag the plane in the right place it could easily take out power to both a primary and backup.
It really doesn't look like a mid-air explosion. It was either a massive spontaneous fire for some reason (assuming the burning thing in the social media post was the plane) or it got shot down.
(which, of course, was your point -- and also, as it turns out, what happened)