The God of Abraham is considered the supreme being by Christians (including Catholics, Orthodox, Protestants, Mormons, etc), Jews, Muslims, and Baha'i, not only Christians and Jews.
In "Left Behind", any unconverted Jews by the time of the Sheep and Goats Judgement go to Hell, so arguably, the God of Left Behind is only the God of Evangelical Christians. Judd even remarks on it a couple of times during the Jerusalem siege.
Either way, the article is wrong and needs repairs. I don't want to start an edit war over it, but it needs fixed.