A.) Hamas is labeled a terrorist organization by the U.S., but has never conducted a single operation known against the U.S. The only Palestinian terror against U.S. interests have been by outlier groups associated more with Marxists. In fact, in 2001 Hamas leaders warned of Al-Qaeda influence among Palestinians as destructive. Jailed Hamas leaders have stated that Al-Qaeda must not be allowed to grow or operate in their territory.
B.) It is no secret that the U.S. negotiated with insurgents in Iraq we labeled as terrorists, as well as the Taliban now. We also once labeled the PLO as terrorists, yet look at how things are now.
Again I would reiterate that the thought once of Israel and Egypt conducting a peace accord was unthinkable. It was also even more unthinkable that Yassir Arafat representing the PLO would be shaking hands with Rabin. Yet there they were just a decade ago on the White House lawn.
Question is if Hamas is sending out "feelers", shouldn't this at least be considered? By the way, I am not naive enough to think there is not already communication between the two. I believe part of the policy in restoring relations with Syria was meant not just as an attempt to wedge Iran from Syria, but also Iran from Hamas. I think a further goal may very well be an attempt at pushing Syria to exert pressure on Hamas to change their policy.
I think most will acknowledge that there will be no peaceful solution without Hamas's involvement. They are after all a major player that controls as much power as the P.A.