Here's a quote from the same document:

The following are considered null and void: the Balfour Declaration, the British Mandate Document, the UN Palestine Partition Resolution, and whatever resolutions and measures that derive from them or are similar to them. The establishment of “Israel” is entirely illegal and contravenes the inalienable rights of the Palestinian people and goes against their will and the will of the Ummah; it is also in violation of human rights that are guaranteed by international conventions, foremost among them is the right to self-determination.

...

Hamas believes that no part of the land of Palestine shall be compromised or conceded, irrespective of the causes, the circumstances and the pressures and no matter how long the occupation lasts. Hamas rejects any alternative to the full and complete liberation of Palestine, from the river to the sea.

Seems pretty clear to me.

which Israel admitted to have propped up and wanted to become the prominent Palestinian group

So, basically what Hillary did with Trump? Oh, that's rich!

I don’t know how well educated you are with the whole history on Israel and Palestine but if you do yourself a favour and do so. You’d understand they more or less wrote „we don’t hate Jews, but we think they are evil and want them noblere near us“. Wich is a common sentiment in the Arab world. Because as a fun fact. The mufti of Palestine was involved in the planning of the holocaust.