Similar responses to what was said at microNL. I'm not the guy playing this, and preflop is unimportant here as the only troublesome spot is this turn. Just saying "Fold preflop" doesn't do anything, this guy got in this spot, and it's a damn interesting spot. The guy completed in the small blind with a suited one gapper, for 1/2 a BB I don't think see how bad of a play this could be. I think I'd probably complete, if there were 3 limpers in front and the BB behind (especially if one of the limpers was a moron who posted 2 hands before the BB got to him).
I know since it's not converted you guys might not realize it, but there are 2 spades, and 2 diamonds on the board. Meaning a spade, diamond, 7, J, T. Basically half the deck are all scare cards. You can expect a call from a combo draw sometimes, and if you take it to the river, you're going to have to fold to half of the deck.
In the end, I sided with the OPs line. I think shoving here is the best possible move, and the only other move that really works is a call here to see the river. If you bet strong here, with nothing behind you're already committed, and say only 1 person comes along, are you check folding every time? To any spade, diamond, 7, J or T? That's the problem here, outside of the fact that these guys clearly like there hands, and with 5 people in the pot I do not think we're going to take it down most of the time. Some draw is going to come along, it's almost a guarentee. You won't only get called or raised only by a better hand, as an aggressive player can raise strong draws here all day.
I did some equity on this, where I put his range at any suited 7 or T w/2 clubs, or two spades, and all hands that beat you Jt, T7, along with 88 which could go all in here trying to push our (in his mind) your draw. So the results were...
equity win tie pots won pots tied
Hand 0: 46.186% 43.10% 03.08% 1119 80.00 { 7s5d }
Hand 1: 53.814% 50.73% 03.08% 1317 80.00 { 88-77, AcTc, AsTs, Ac7c, As7s, KcTc, KsTs, Kc7c, Ks7s, JcTc, JsTs, Jc7c, Js7s, Tc9c, Ts9s, Tc8c, Ts8s, T7s, Tc6c, Ts6s, Tc5c, Ts5s, Tc4c, Ts4s, Tc3c, Ts3s, Tc2c, Ts2s, 9c7c, 9s7s, 8c7c, 8s7s, 7c6c, 7s6s, 7c5c, 7s5s, 7c4c, 7s4s, 7c3c, 7s3s, 7c2c, 7s2s, JTo, T7o }
Now if two people come along, you're only at about 20% equity. Which isn't good for the shove, but it could be worse. Any 2/3/4/5/6/9/Q/8/A/K that isn't a diamond/spade, is a pretty safe card (although 9/q/6/8 are give a set a FH, but I won't be giving them credit for the only had they could possibly have that would bet in that situation, 88). So 20 cards that are safe, in the entire deck. If you bet here and get called, are you going to fold to any action on the river if any scare card comes?
This is the big problem with betting this turn. If you bet, you get put in a tough situation if you're check raised, and you're in a tough situation if a scare card comes and he bets the river. This is why I feel the shove is the best option, because it's the only way to end this hand without putting yourself in a gut wrenching position. Because you can get draws to call (opponent dependent, but a lot of the time), and while they can call with the two hands that beat you, that's not all they'll call you with. In position I might be able to agree with a bet here, I think that would probably be good in that situation. OOP, I think calling or shoving are your only options, and if you call you're still OOP and all draws are staying in so your hand is pretty much worthless at this point.
That was my theory on this, and I think the OP played it well. The only problem is, I want to verify this, or get other opinions as to why this was a bad move. It's probably the most interesting hand I've ever encountered, and I want to try to find a definitive best move in this situation.