Hmm.. lemme check. Nope, nothing in the Bible about Native Americans, sorry.
Yeah, that's worked out quite well for them so far.
Where they got it is irrelevant. They have it.
As for them being defated.. Even if the entire Arab world united in an effort to take Isreal, all Isreal would have to do is ask for help, assuming it was even needed. It's one thing for the UN to step in where it's not wanted.. controversy and all that. It's quite different if a nation actually asks the UN for help. There would be a military force there in no time at all that could repel any incoming invasion. Nothing short of a nuclear attack would do it. And that's not going to happen, for several reasons. First, the missle would probably never reach it's destination. Second, whoever launched it would be subsequently destroyed themselves, probably by the Isreali counterattack, if not by their allies. You ARE aware that Isreal is a nuclear power, yes? And thirdly, the Arabs also consider Jerusalem to be a holy city.. they wouldn't destroy it any sooner than they'd destroy Mecca. Damage it, yes, that's already been done.. but destroy it? I don't think so.
Bear in mind that my belief about Isreal's abilities aren't soley based on military knowledge. They're also religious. These are God's people, in God's land, put there by God Himself, and given what they need to defend themselves and keep it. That's the main reason that I believe they would win against any aggressor. God truly is on their side.