I think it's probably more the geopolitics, Isreal is in deep with the Military Industrial Complex, the US Intelligence Agencies, and the future plans the US has for the Middle East (namely the agreement between the US, Israel, the Saudis and India to create a trade passage through the area).

But yeah, if you look at Peter Thiel's work with Israel's intelligence R&D company Carbyne you'll find US agencies near by...

...and lots of these shadey dealing go back generations and have been done by Republican and Democrat Presidents. I think it was Obama who agreed to give Israel 38 billion to buy US weapons - an agreement which basically made the US the sole external supplier for their munitions.

I suppose beyond that it's historical, religious, and racial... But there's more to it than that.