Hijab is a senior fellow at the Institute for Palestine Studies and Gassner is one of the founders of BDS.
The actual goals are not spelled out, but it becomes pretty clear what they are - destroying Israel, on both sides of the Green Line.
There is a problem in the debate itself. By focusing on the ultimate settlement and whether it should be one state or two, the discussion too often leapfrogs the need for a process of decolonization as well as reparations for the damage inflicted upon the Palestinians. Decolonization and reparations must be part of the final settlement, whether it is that of a Palestinian state in the Occupied Palestinian Territory (OPT) adopted at the Palestinian National Council in 1988 as an expression of the Palestinian right to self-determination, or that of one state in all of the former British Mandate Palestine in which all citizens are equal.Decolonization is not really defined well, but the goals become clear when the writers speak about the Green Line:
Perhaps at the end of the day a just one-state solution will become a reality, and then there will be no need to insist on holding on to the Green Line to ensure that IHL is applied to the OPT. Until then, however, Palestinians must not give up the sources of strength and power they have today. Otherwise, we risk losing the tools offered by IHL and legitimizing the Israeli settlements instead of advancing our cause.
So talking about a two-state solution is a scam - but it is necessary because they believe that they have solid legal grounds to insist on a state in the territories to begin with, based on pressuring Israel on "occupation". But that isn't the goal - it is a stage.
This is a little more explicit here:
A framework of analysis is strategic if it allows Palestinians to make effective use of their available sources of power in a struggle for decolonization and reparations that pursues a set of clear core goals. The question that arises at this point is: What are the Palestinians’ core goals? To date, the “goal” has been largely defined as a sovereign state along the 1967 borders with Israel. Yet referring to what is actually a political settlement as a goal confuses the issue. The Palestinian struggle has always been about Palestinian rights in and to the land of Palestine. The original solution adopted by the Palestine Liberation Organization in the 1960s was that of a secular democratic state in all of Palestine. This was followed in 1974 by a decision on an interim solution for a state in any part of Palestine that was freed, and in 1988 by a decision for a state on the 1967 borders. However, the purpose of all these political solutions was to fulfill Palestinian rights in and to the land of Palestine.