For the time being at least. The key for the immediate future is the strength of many of these organizations to resist political pressures from the wacko left at a time when the regime in Washington, of which J Street is a "Jewish" appendage, is markedly more anti-Israel than any of its predecessors.
Not a precise comparison, but the Conference of the Presidents of the Major Jewish Organizations needs to show the fortitude of Israel herself in resisting in the face of an existential threat.
In the past, some of these Jewish organizations have succumbed to leftist power plays on other issues, such as gay marriage.
Jews supporting this Regime will be judged by God as Capos.