I agree. I had a professor (engineering school) that had worked on fighter aircraft -structurally. I remember him saying a civilian jetliner would “come apart” in a powered steep dive between 700 and 800 mph. That the plane came apart doesn’t automatically mean it was a bomb.
One of my many silly past times is watching those videos you can find on youtube about plane crashes.One such episode told the tale of a 747 that,for some reason (can't recall the reason),became uncontrollable at 35,000 feet.Long story short...after a terrifying period (a long one IIRC) of steep dives,sharp turns,etc the crew managed to get it on the ground.The plane was pretty much in tatters when it landed...rudders and flaps torn off...wings damaged,etc.The narrator said that experts said that it was a miracle that it didn't break apart completely.
IIRC the airline was an East Asian one...Taiwan I think (but I'm not sure).
https://en.wikipedia.org/wiki/China_Airlines_Flight_006