It's hard to vote here because I think it's a combination of factors. It is both, it is neither, and it is a whole lot of other things as well.
Calling Hamas' initial attack part of a "religious war" almost makes it sound more meaningful than it was, because I can't see it as anything besides a vicious terrorist attack. I don't think there was any reason behind it but destruction, politically-motivated antisemitic destruction. That said, I think Iran, Hezbollah and Hamas have framed the ongoing conflict as a religious war. It still feels a little inaccurate to say, I suppose because while antisemitism is an inherent part of their extremist religious ideology, it's difficult for me to think of antisemitism as a religious belief as opposed to a racist concept. The only thing making it "religious" is that Hamas/Hezbollah say it's religious, and I try not to give weight to their ideas. It's certainly not a wider representation of Islam as a religion. Could it be argued that Hamas want a land-grab of the territory Israel have taken command of over the last several decades? Yes, but I think that's a motive of their operation as a whole and only a background motivation of their continued strikes on Israel, which seem to be intended to terrify Israeli civilians, retaliate against IDF actions, and further drive the conflict. On the ground level, I imagine a good amount of those recruited into the lower levels of the Hamas military view it as self-defence, even though that obviously isn't the goal of their leaders.
That said, I also think characterising the conflict as an " Israeli land grab" is a little hit-and-miss, though I believe it is partially true. The Israeli government would disagree, because they frame the ongoing bombardment as purely an act of defence. I don't want to be misinterpreted, because Israel absolutely have the right to defend themselves from terrorism as any other country, but I don't believe their continued actions are either effective or particularly believable as defence. It's ineffective as defence in that is impossible to kill an ideology and instead I fear the Israeli government and military actions are instead laying the groundwork for an increased terrorist threat in the future driven by fear and vengeance. I also worry that the Israeli government is driving away many of their international allies, support I sincerely hope can be swiftly returned if there is significant governmental change ousting Netanyahu and far-right ministers. It isn't believable as defence because of the numerous contradictory comments from Israeli government officials, some of which were laid out in the ICC court case, and the increased drive of illegal settlers in the West Bank. Settlers have spoken, even to BBC interviewers, about their plans to build in Gaza after the war. It may not have begun as a land-grab, but it is clear that the government, military and settlers have jumped at the chance once given an excuse.