They're panicking, American Christian Evangelicals are one of, if not the largest supporters of Israel approx 30 million+. Unfortunately the Scofield Bible which deliberately misrepresents scripture has been wholly accepted by this group as the truth.
Leading to millions of people like Senator Ted Cruz who said:
"As a Christian, growing up in Sunday school, I was taught from the Bible that those who bless Israel will be blessed, and those who curse Israel will be cursed. I want to be on the blessing side of things,” [an apparent reference to Genesis 12:3.]
And
“Biblically, we are commanded to support Israel."
Losing this base would be extremely detrimental.