A few main principles of Hamas' ideology, as articulated in its Charter and in statements by its leaders and spokespersons, are the following:

--The conflict with Israel is a religious war between the Muslims and Jews that will continue until the End of Days.

--Jihad and martyrdom are the only way to liberate Palestine "from the river to the sea"

--All of Palestine, "from the Jordan river in the east to the Mediterranean in the west" is waqf land (i.e. a religious endowment sacred to Allah), so the religion forbids relinquishing even an inch of it. Peace negotiations and normalization with Israel are forbidden and anyone who engages in them is a traitor against Allah and His Prophet and is destined for Hell.

--Israel has no right to exist, and jihad against it must continue until it is eliminated and all of Palestine is liberated

--No Israelis are civilians. All Jews in Palestine, including children, are combatants and may be killed by every means: stabbed, beheaded or bombed, including in suicide operations.

--Tahdia (a temporary lull in fighting) with Israel is possible as a tactic, but the overall strategy is ongoing jihad

--Martyrdom is a supreme value and part of jihad. Martyrdom-seekers (i.e., suicide attackers) "love death as much as the enemy loves life" and are rewarded in Paradise.

--Antisemitism: Jihad is against the Jews, who are destined for annihilation.

--The Jews are "the descendants of apes and pigs"; they are subhuman or "microbes."

https://www.memri.org/reports/hamas-charter-%E2%80%93-ideology-behind-massacre