Liberals often assert that Evangelical support for Israel is based on Evangelical theology, specifically those aspects having to do with the Second Coming of Christ. This assertion is generally made in a manner which is contemptuous of both Israel and of the Evangelicals, and is intended to portray the opinions of the latter as irrelevant to those who do not share their particular religious beliefs.
I’m sure some Evangelicals support Israel for theological reasons. But I don’t think that theology is the primary factor at work here.
The truth is, most Americans instinctively tend to support Israel. Where hostility to Israel exists in this country, it usually arises from leftist politics and worldviews–and these, in turn, are closely connected to the universities.
Evangelicals are largely outside the force field of attitudes centered on the academy. I suspect it is this, rather than any specific theological factors, which account for the high support for Israel among this group of Americans.
I’d hypothesize that people who come from the same social groups as the Evangelicals, but who are themselves atheists or agnostics, tend to share Evangelical attitudes toward Israel.