KK as overpair vs. unknown POLL INCLUDED!!!!

[RikaKazak]

This is the first hand the vilian has played. (he literally just sat down and he's the big blind) pokerace has no stats on him, and I have no notes. I was thinking about just calling flop, and evaluating turn instead of raising like I did.

5/10 NL 6 max

UTG folds
Hero $1,000 pfr to $40 with KK
CO folds
Button folds
SB calls covers(TAG winning player)
Villian..BB.. calls ($1,000)

Flop ($117) Q95 with diamond draw, hero has black kings

SB checks
BB bets $80
HERO!?!?!?! (who calls here?)
Hero raised to $250
SB folds
BB reraises the minimum to $420
HERO!?!??!?!?!