Either due to the anti-conservative backlash of the Scopes Monkey Trial and/or the Great Depression leading to a widespread resurgence in Christian fundamentalism or other reasons, make US Christian fundamentalists spearhead another crusade where they colonize and occupy Jerusalem and Palestine, peacefully or otherwise. Ideally WWII is kept as OTL as possible, but if altered the post-WWII world should remain generally similar in power balance (US vs. USSR).