Laydown KK here preflop?

[KHALI]

$10 table on paradise. Second level(10/20)
7players left Hero is second stack with 1800.

Hero is button with KK
Middle player raises to 80
Late calls
Hero raises to 300 (what do you think of the size here?)
blinds fold
Middle raises all in 2700 total
late folds

Do you fold to the only stack that can break you here and lick your wounds to fight another day. Obviously I called even though I felt I was against aces. Is it really a no brainer here based strictly on tournament situation?
And if this is so could I not make the same play with any two cards and fold to the all in? Are my kings irrelevant here?