Easy fold preflop with KK ?

75 € tourney. Level 5 and blinds at 100/200. Ive had a great rush so far. With the average stack around 6500 im 2nd in chips with 31000. And ofcourse the villain in this hand is the one that covers...

I limp UTG with KK. A shortstack pushes his last 700 from MP. Villain raises 2400 from the BB. Such obvious isolation...? I pop it up to 6000 and Villain makes the fastest instapush ever.

Easy fold ?