$15+1: JJ- weird limp

[ShawnM]

Could not find a hand converter for ipoker (titan).
Down to the final 2 tables, 12 players remaining. Prize distribution is top heavy ($1400 for 1st and $38 for 11th?!). I've only shown down premium hands as a result of being mostly card dead and sitting to the right of the big stack for the past hour or so.

Reads:
UTG+1: Was a large stack at one point and very aggressive but since the big stack sat down - has blinded down. Limped folded a few times and limped kk once when the big stack was in the BB.
Button: Mostly typical big stack player. Did raise fold getting 3 to 1 against UTG a few hands ago...
SB: Very loose and aggressive. Whenever Big stack folds, hes taking the lead trying to steal the blinds. Caught trying to steal my BB about 20 hands ago with j2o from EP (I don't blame him as I might of played 5 or 6 hands in the last 25 mins or so). He had around 13 BB at the time. I bit too agro for my taste but I'm weak so what do I know.
BB: Sat down the last hand - no reads

Stacks:
UTG : 18840
UTG+1 : 23752
Hero : 24872
Buton : 76574
SB : 35421
BB: : 36957

Hero dealth: JJ
UTG folds, UTG+1 limps, Hero ?

Every time someone has limped, the big stack or SB guy pushed and it was folded other than the one call by KK. Should I just go all in after the limper or should I be scarred enough that he's limping a monster hand in the hopes of being raised? Be gentle...

I've placed the results in white below:
<font color="white"> Hero limps (I intend to fold if one of the big stacks raised and the MP limper went all in), Button folds, SB goes all in, BB folds, UTG+1 folds (!), I call and lose to the SB horrible pushes with 44 </font>