KJ on the bubble - defending my big blind

[Isura]

Is there not enough folding equity at the 20s to make this move? I interrpreted the big raise as a medium pair, a decent ace, or a blatant steal (steal probably less likely considering my stack). I figured it's going to be hard for villain to call with pairs less than TT, and stuff like AJ-A9 or KQ, although he's getting better than 2:1 on the call. Another reason I liked the push was because villain will still have 6bb and be even with the other shorter stack if he folds this.

***** Hand History for Game 2399740261 *****
NL Texas Hold'em $20 Buy-in + $2 Entry Fee Trny:14125523 Level:6 Blinds(100/200) - Thursday, July 21, 13:57:47 EDT 2005
Table Table 13946 (Real Money)
Seat 1 is the button
Total number of players : 4
Seat 1: callalljones ( $1995 )
Seat 3: liquidity73 ( $1855 )
Seat 8: testbatsmen1 ( $2905 )
Seat 10: JD0101JD ( $1245 )
Trny:14125523 Level:6
Blinds(100/200)
** Dealing down cards **
Dealt to testbatsmen1 [ Jc Kd ]
JD0101JD folds.
>You have options at Table 13772 Table!.
callalljones folds.
>You have options at Table 13785 Table!.
liquidity73 raises [650].
>You have options at Table 14001 Table!.
Your time bank will become active in less than 20 seconds. If you do not want it to be used, please act now.
testbatsmen1 is all-In [2705]
>You have options at Table 13772 Table!.
not many testbatsmen left today
liquidity73 folds.
testbatsmen1 does not show cards.
testbatsmen1 wins 3655 chips