There’s no need to wonder what their goals are, it’s in their charter. It’s kind’ like a prescription for a maladjusted personality.
http://www.mideastweb.org/hamas.htm
The principles of the Hamas are stated in their Covenant or Charter, given in full below. Following are highlights.
"Israel will exist and will continue to exist until Islam will obliterate it, just as it obliterated others before it."
"The Islamic Resistance Movement believes that the land of Palestine is an Islamic Waqf consecrated for future Moslem generations until Judgement Day. It, or any part of it, should not be squandered: it, or any part of it, should not be given up. "
"There is no solution for the Palestinian question except through Jihad. (<-- There's that word again -ed.) Initiatives, proposals and international conferences are all a waste of time and vain endeavors."
"After Palestine, the Zionists aspire to expand from the Nile to the Euphrates. When they will have digested the region they overtook, they will aspire to further expansion, and so on. Their plan is embodied in the "Protocols of the Elders of Zion", and their present conduct is the best proof of what we are saying."
Ami Isseroff
It seems odd to me that Pal/Arabs are whining about land lost to Israel during the various Arab initiated wars.
Under most historical interpretation of Islamic law, lands conquered rightfully belong to the conquerors. From what I know, Muslim scholars have differed over time on whether this rule applies only to Muslim conquest or that of all men, but there are certainly those who believe (obviously, considering issues like Palestine and Spain) that lands conquered by Muslims become irrevocably Muslim, whereas no such nicety exists for lands conquered by infidels.
It's archaic and most of the modern world has moved past feudal relics like this, but well, most isn't all.