Tell that to the Palestinians whose parents and/or grandparents were kicked out of their houses by Jewish settlers. Its pretty straightforward to them, they lived in a house, that either they or their families built and then were kicked out of it by a bunch of jews that migrated from Europe under the pretense that god promised them the land.
No question it's straightforward to them. Personally, I think the state of Israel was a horribly misconceived idea.
But then again, nations fragment or go under migrational changes all the time as a part of a natural human process. The roots of the changeover may differ, but it's an old story. It's never 'right' -- it often just is. And in response, and in resistance to this fact of changing populations and cultures in different lands, you get people like the Frenchies trying to ban the hijab and Californian Tea Partiers wanting to sick dogs on Muslim worshippers to keep them from opening a mosque in town. The origins of the cultural change can be different, but its the same forces nonetheless. Globalization has existed since homo sapiens showed up (and even before that).
So yeah, you can reverse the state of Israel. And tah dah! You've just created three other generations of different people who will then suddenly raise the same beef. The cycle continues. The only constant is that none of us own or are entitled to the land -- and we kill ourselves over the delusional belief that we do.