Based on the need for ancient history to claim a people, there's no Americans either. Does that mean we give everything back to the indigenous people? I hope so. Also even if they're Arabs as you say, that doesn't mean you can just murder them indiscriminately like this.
Yes, an American politician should be wary of making the argument that non-ancient roots in an area make their claim on their land default.
Honestly, I have trouble dealing with the irony that American politicians are pro-zionism becuase Jews used to hold the land a long time ago until they were outcast from their homelands aand forced to move far away, displacing Palestinian people that live tthere now in the process.... and then think that Native American sovereignty (let alone their claim to their historical lands that were stolen from them) are ridiculous and unfair to contemporary US citizens that live here now.
Yes, because Israel definitely doesn't have nukes. That would be in violation of international non-proliferation agreements, and they have the utmost respect for international law.