Israel was created as a state by the UN after the other people who lived in that region (Formerly the Ottoman Empire) fought for the Axis and lost in the world wars.

There were other territories that were also carved up and handed to other countries, and you don’t see the same issues there because their neighbors didn’t invade them because they were unhappy with the borders drawn by the UN.

Israel has quite literally been under attack by multiple other countries since it was created.