Brother James, everything you've said here is the boilerplate ISO reaction to Syriza from day one. And that analysis has been wrong at every single turn. If Tsipras was this great "trojan greek", the referendum need never have happened. Further, it's clear that very "capitulation" has been rejected emphatically by the Troika, indicating that if he's determined to cave, he's doing a very poor job of it.
Syriza has the insanely difficult task of playing point man in the battle against an authoritarian EU AND a global neoliberal order with next to no leverage. And that requires a ton of tactical maneuvering, strategic adaptability, and flat out deception (not to us, but to the overlords) just to make a game of this. Complicating this immensely is the profound desire of Greeks to remain in some form of European union.
In this position, the luxury of bleating out revolutionary slogans hoping they'll rally the people to direct conflict with the financial class is not a luxury they have. The portions of the Left who are having trouble following this complex circus need to show more patience than this, and far more trust to a regime that has earned at least some.
Here's what we know: Syriza has repeatedly pledged to attempt to "pay its debts" by offering packages that have had a 1005 rejection rate. It's safe to assume that Tsipras and co. have figured out that every reasonable offer they make will be rejected, but with every rejection they get more traction among the Greek people for executing additional forms of resistance. This is an unfortunately slow process, but one that has to be done. Now if this ws how it went down in the past, couldn't it be that this game is still being played? Perhaps with a new goal in mind, say, another referendum that covers EU membership or, perhaps, a move into another form of alliance elsewhere?
These brothers and sisters need our support desperately, and we should give it to them, not snipe dogmatically from the sidelines. Now certainly if he offers a terrible austerity package that is accepted, than I would probably be in the wrong here, but so far, that hasn't happened. It's unlikely to happen this time, either.
The worst thing any leftist could do right now is to turn their backs on Syriza and the greek people just because we don't always understand the game that's being played and a handful of butthurt authoritarians who run an internet rag say it should be revolution or bust. Let's be comrades. They've earned that much from us.