This guy is on tilt and has pushed for his stack preflop the last 6 hands. I settled on a hand range of A9+, 99+, KQ. I pick up A10 and once again he's all in. With only one limper behind me, I push to isolate and to my surprise, the limper calls as well. What's going on here? Should I have picked a better spot?

***** Hand History for Game 4283284398 *****
$25 NL Texas Hold'em - Tuesday, May 16, 07:26:38 ET 2006
Table Table 107943 (Real Money)
Seat 3 is the button
Total number of players : 6
Seat 3: booties_x ( $22.95 )
Seat 6: zaaaaaak ( $27.10 )
Seat 1: TheAdvent ( $26.15 )
Seat 5: luckybulle ( $40.10 )
Seat 4: HOLYCALL ( $14.18 )
Seat 2: pbm107 ( $18.80 )
HOLYCALL posts small blind [$0.10].
zaaaaaak posts big blind [$0.25].
** Dealing down cards **
Dealt to zaaaaaak [ Ad Ts ]
TheAdvent folds.
pbm107 folds.
booties_x calls [$0.25].
>You have options at Table 107971 (No DP) Table!.
HOLYCALL is all-In [$14.08]
zaaaaaak is all-In [$26.85]
booties_x is all-In [$22.70]
** Dealing Flop ** [ 7s, 4d, As ]
** Dealing Turn ** [ 8c ]
** Dealing River ** [ Td ]
HOLYCALL shows [ Jh, Kd ] high card ace.
zaaaaaak shows [ Ad, Ts ] two pairs, aces and tens.
booties_x doesn't show [ Ah, Jc ] a pair of aces.
zaaaaaak wins $4.15 from side pot #2 with two pairs, aces and tens.
zaaaaaak wins $17.54 from side pot #1 with two pairs, aces and tens.
zaaaaaak wins $40.54 from the main pot with two pairs, aces and tens.