Poker hand evaluation

(position is as best i can remember it offhand)
I am in BB

folds around to button, button is shortstacked, maybe 2 BB's left.

SB Re-raised up to 4BB

I have 25ish BB's left. I have k7 spades.

I call

1) This is a knockout tourney, 20% of buyin for knocking someone out.
2) The all in button had just lost a big hand, and was probably shoving with anything trying to steal blinds or make a final stand.
3) No matter what the SB has, he made a smart, defensive raise, trying to keep his post-flop risk to 0
4) I know that for the most part the SB wont hit the flop the majority of the time, and that I can probably get him to fold with another 3x BB raise

Is this play passable? I did hit, and force him out with a raise. he said he had AQ and told me it was a shitty play. I ended up making back enough that i at least broke even on the play. Not the best ROI, but if you consider the potential of playing headsup against a weaker hand (and it was a weaker hand, he just happened to 2 pair it)...

Probably wouldnt have bothered in a normal tourney but used the knockout bonus as justification :P

iso the shortstack, i have no respect to minraises lol

It wasn't actually a minraise, but I think pot odds would warrant a call here. Also, how many chips did SB have?

SB had me covered but not by much as I recall.

why would you call here and have to worry about playing for a sidepot? if bets flop youre most likely folding, so its kinda a stupid spot to get into.

imo the sb is most likely some weakish fish thinking that his small raise will iso the BB and allow him to play a HU pot vs the all in guy.

^ if SB had AQ he played it really terribly, and he should just be jamming overtop of you to iso the button all in. like i said hes some weakish scared fish.

I mean your logic in the fact that you want to play a hu pot against the allin guy is correct, however, in this case you really wanna get him out of the pot preflop.. He obviously is kinda scared to play his hand 3way (hence his weirdo small raise) if you 3bet him, hes prob going to fold, i mean if he wanted to stack off with AQ id be inclined to think he does something more then gay raise to iso lol. if you ship pre theres his dead money in the pot, plus your hand has great equity against w/e the crap that the button is shipping in.

I just think that if you just elect to call his raise, and see a flop that youre in a terrible spot and its just bad. You dont know where youre at in the hand, you dont even know what his range is at this point and then you have to play a flop against him with 20ish big blinds effec. just a bad spot.