$15 stars turbo - TPTK vs all in

[JSampras1]

I probably should have bet out in this situation, but i wanted to see if there was ridiculous pushing with all of these people in before i acted.

I know at first view it looks like a weak call, but at $15 i was almost 100% sure i was not facing a strong hand. My read was almost certainly a flush draw or possibly a straight draw.

PokerStars Tournament, Big Blind is t20 (8 handed) Converter on pregopoker.com

UTG (t1380)
UTG+1 (t1480)
MP1 (t2210)
MP2 (t2120)
CO (t1470)
Button (t1860)
Hero (t1480)
BB (t1500)

Preflop: Hero is in SB with K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img]
UTG calls t20, <font color="gray">UTG+1 folds</font>, <font color="gray">MP1 folds</font>, MP2 calls t20, CO calls t20, <font color="red">Button raises to t80</font>, Hero calls t70, <font color="gray">BB folds</font>, UTG calls t60, MP2 calls t60, CO calls t60

Flop: (t420) 4[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] (5 players)
Hero checks, UTG checks, <font color="red">MP2 bets t2040 (All-in)</font>, <font color="gray">CO folds</font>, <font color="gray">Button folds</font>, Hero calls t1400 (All-in), <font color="gray">UTG folds</font>

Turn: (t3860) 6[img]/images/graemlins/spade.gif[/img] (2 players)


River: (t3860) J[img]/images/graemlins/club.gif[/img] (2 players)

Is this a bad call? Turned out my read was correct (although he had a straight flush draw). I don't normally want to risk my tourney early on, but it's a turbo and if my read is correct he's 2.5-1 to hit the flush draw, plus he could be in with a random bluff.

What do you think?