Its not really even the Evangelicals, its about trade - in the case of the US, military trade. When it comes to politics, evangelicals are thrown scraps, rather than having real influence. Its all about money

Israel spends 1/5th of its budget on military.

Israel is one of the biggest military spenders in the world. Where as the UK might buy some US planes - Israel buys the planes, the pilot training, the ATC, the weapon systems, the software, the weapons, the flight suit, the runway etc.

And thats why the US protects them so avidedly, because if they didn't, the UK, China, France or Russia would just become the 'new veto providing weapon provider'.

They're the number one country to do business with, if you're in the business of defence.