$100 live tournament hand--JJ UTG with 17 players left

[hagbard celine]

Started with about 85 players, 17 left, top 10 cash.

I have just been moved to a new table, and so have little information on the players.

The blinds are at 400/800 with a 100 ante. I am UTG with 15,000 in chips (probably slightly above average).

I look down at JJ, and raise to 3,000. Everyone folds around to the BB, who quickly moves all in. He has 400 fewer chips than me.

I begin to talk to him, asking him questions. My feeling initially, before talking to him, is that he has QQ, KK, AA, or AK.

After asking him a few questions about his hand, how he plays, etc. I feel that he is putting me on a middling pair, and is trying to steal with AK, AQ, AJ, maybe even KQ. He seemed extremely uncomfortable, and very weak. My impression was that he really didn't want a call. At the same time I have never, under similar circumstances, risked my tournament calling an all in with JJ.

Any thoughts? How much trust do you put into your read here (assuming it's similar to mine)? Do you just fold automatically?