What was this guy thinking...

[Creole]

Sorry I don't have the converter, but I'll give you a to the point breakdown. $10 Multi Poker Stars 150 of 867 players left, top 81 make the money, blinds 400/800 50 ante Hero (t24000) AsJs on the button. Folds to me, make it t2400. BB (t54000) calls. Flop 6sAd9s. BB bets 1200, I make it 10250. He reraises me all in. I call, he turns over A7o. Turn 3d river 7h. Did this guy play this hand right or did I do something wrong? I had a good read on him and knew he was just playing his stack instead of his cards. I raised preflop to show strength and my post flop raise, I thought was strong enough to confirm the strenght. Did he really think I was weak? How do you call this post flop raise will A7o? Am I missing something? This hand is really bugging me. Sorry again about not having the hand converter.