Should I even call his flop opener here?

[J Chap]

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (9 handed) converter

MP3 (t780)
CO (t770)
Hero (t775)
SB (t785)
BB (t1620)
UTG (t785)
UTG+1 (t790)
MP1 (t965)
MP2 (t730)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/club.gif[/img].
UTG calls t15, <font color="#666666">2 folds</font>, MP2 calls t15, MP3 calls t15, <font color="#666666">1 fold</font>, Hero calls t15, SB completes, BB checks.

Flop: (t87.50) 6[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, <font color="#CC3333">BB bets t100</font>, UTG folds, MP2 folds, MP3 folds, <font color="#CC3333">Hero raises to t300</font>, SB folds, <font color="#CC3333">BB raises all-in for 1620.</font>

Am I folding to his t100 opener? He did get a free flop, after all, so who knows what kind of weird two pair he could have...

Thanks for your help, dudes-

J Chaaaaaap