Fold to a river minraise?

Opp is loose, but otherwise unknown.

PokerStars No-Limit Hold'em, $0.25 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

BB ($13.90)
UTG ($6.85)
Button ($25.45)
Hero ($35.70)

Preflop: Hero is SB with Qhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Ahttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
2 folds, Hero raises to $1.25, BB calls $1.

Flop: ($2.50) 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif, Thttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Thttp://www.flopturnriver.com/phpBB2/...miles/club.gif (2 players)
Hero bets $2, BB calls $2.

Turn: ($6.50) Qhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
Hero checks, BB checks.

River: ($6.50) Jhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
Hero bets $4, BB raises to $8, Hero...

I would bet the turn.

My thinking was that only a T calls that flop. His check behind on the turn made me think otherwise, so I fired at the river. His raise though could be a bluff or could be a T looking for value..

players at these stakes love to slowplay ridiculously

River miniraise usually means you're beat by these guys. A bet on the turn would have cleared this up a lot for you. As played though, I think you still have to call.