Does a historical claim hold weight over a long established later claim? No-one knows the answer to this one - how old must a claim be before it becomes invalid?
Are restrictive religious laws ok? I think the resounding answer is always "mine are, but theirs aren't", which really is just a recipe for war eternal. They never strike me as ok, because most of them focus on making a group of people "the other".
Is murdering civilians to achieve military objectives ok? No, it isn't, everyone knows that really - it's an idea that belongs in the middle ages and should have been left there.
I don't think I could join the Israel vs Palestine camps (both governments are shit - both are out for genocide), I think I prefer the camp filled with people who just want an end to the conflict, people who live on both sides of those ill defined borders.
What does everyone who matters (the people living through this hell) really want? They want their lives back, the ability to be themselves, and carry out their traditions undisturbed. Most of all, they want the killing and persecution to stop, and the time to mourn their losses.
How do we do that? Put the guns down, stop the bombardments and bombings, have each side treat the wounded of the other side, and then figure out the rest without starting the killing again.