Where did you get this idea that blood is being spilt for a "Holy Land."

This is not a war between different religions. There are Palestinian Jews who are just as oppressed under Israel's apartheid regime as Palestinian Muslims are.

Palestinian armed resistance is an entirely justified response to a settler-colonial regime occupying Palestinian territory, tearing native Palestinians out of their homes so that they could be given to colonizers, massacring the native population and stripping them of rights in an ongoing project of ethnic cleansing and genocide over the last ~75 years. Nothing about this is a holy war, Israel is a settler-colonial state that has been militarily occupying Palestinian land, relegating Palestinians into a status of second class citizens in their own homes and ushering them into what are effectively open air prisons in places like the Gaza Strip where they are unable to leave from, all while their labor is exploited to make the lives of the Zionist colonizers more comfortable.

This war is a response to decades of extreme oppression. This is not two groups of roughly equal standing bickering with each other, this is is a brutal military occupation financed by the largest military empire in the history of the world so that the US military can have a technologically advanced military ally in the middle east, fighting against the people who have had their land stolen and lives torn apart who are trying to mount an armed resistance to the injustice they have been forced to live under for generations.

There is absolutely no possible world where this is an issue where "both sides" are at fault. Different religious factions will be able to co-exist when it is Palestinian land once again. There is no co-existence with a settler-colonial state whose existence is predicated on the genocide and ethnic cleansing of the native population, theft of their land, and exploitation of their labor as colonial subjects/second-class citizens living under and apartheid regime.