obvious fold on A high board, right?

[Dhani]

$1-$2limit on Pokerstars.

Hero is in SB with black kings.
1 fold, UTG+1 raises, 2 folds, MP 3 bets, 1 fold, Button cold calls 3 bets, Hero...
1) Would you say that this is always an easy cap? I say no even with pocket kings in the SB.
...Hero cold calls 3 bets,BB folds, UTG+1 calls.
13 bets to the flop.
A [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/club.gif[/img]5 [img]/images/graemlins/spade.gif[/img]
UTG+1 leads out, MP calls, button calls,
HERO SHOULD FOLD and he does.
2) I know the pot is big, but what would the point of me calling down here to see 1 of 3 other players have an ace?