Religion is beside the point--and actually, before the partition that violently forced many Palestinians to flee their homes for refugee camps in 1948, Arabs (including Palestinian Christians, Arab Jews, and the Bedouin people) and Jews were living peacefully together on the land, other then some zionist fanatics who were fomenting conflict. They did not need a Jews-only state back then and they obviously don't need it now because anti-semitism has declined all the world over. Israel is a racist colonial apartheid state that has been illegally annexing and occupying Palestinian land for decades before Hamas and their primitive projectiles (they aren't actually rockets) existed.
Palestinians have a right to all of Gaza, the West Bank, and East Jerusalem as an independent, contiguous, sovereign state. But Israel has intentionally built settlements to block Gaza off from the West bank and has repeatedly poisoned and murdered Gaza over the last five years while starving it's people of adequate food, medicine, rebuilding materials, and any political freedom or agency. Israel as an occupying power does not have a 'right' to murder Palestinian children playing on the beach, bomb hospitals full of sick people, bomb entire apartment complexes killing all the families inside, or bomb UN shelters filled with refugees.
Israel's far-right government is fucking insane; which is why so many young, liberal and secular Jews are leaving Israel every year, because they can't stand the way their culture is going, with lynch mobs marching in the streets chanting 'kill all leftists' and 'kill all arabs.' While Palestine has no army, no navy or air force, Israel sends it's youth to prison if they refuse military conscription. While Israel blockades Gaza, sealing it's borders from land, sea and air, Gazan's quite understandably built tunnels to bring in goods from the outside, which the Egyptian dictatorship managed to seal without a single bomb. This aggression from Israel is all about their undying thirst for more and more Palestinian land and punishing Palestinians for simply existing.
They bombed Gaza's sewage treatment plants, their universities, power plants, when Gazan's already have only 3 hours of electricity on a good day and little-no clean water. Israel in contrast is a wealthy country, most of the so-called rockets from Hamas land in the middle of nowhere, and each time Israel 'mows the lawn' in Gaza, they murder thousands of innocent civilians. As the occupying power, it's their responsibility to choose the just and nonviolent route towards peace, by ending the blockade of Gaza and going back to the 1967 borders, as international law requires them to do. Despite Israeli propaganda, all Palestinian factions would accept this just two-state solution.
Palestinian demands that a ceasefire leads to Gazan freedom are perfectly just and justified. Unlike Israel, Gazans (and not just Hamas) actually have a reason to fight the invading Israeli army, since they are so desperate to breathe. Palestinian's have a good reason to resist occupation, but since they alone have not been able to force Israel to stop it's atrocities and belligerent, entitled annexation of their land, the international movement for boycott, divestment and sanctions exists to to make the cost of Israeli policy too much to bear.