Bad River Raise

Here is an example of a terrible river raise. It's the kind that will get called by many better hands and few worse hands. Calling in this spot would have been much better. I think the hand was played fine until the river decision.

Party Poker 3/6 Hold'em (9 handed) converter

Preflop: Hero is BB with 9s, 7s.
4 folds, MP3 raises, 2 folds, SB calls, Hero calls.

Flop: (6 SB) 8s, Th, 8c (3 players)
SB checks, Hero bets, MP3 calls, SB calls.

Turn: (4.50 BB) Qs (3 players)
SB checks, Hero checks, MP3 bets, SB calls, Hero calls.

River: (7.50 BB) Jh (3 players)
SB bets, Hero raises...