Whether the preterists are entirely right is a different issue from the one at hand. As for the question of “a national future for Israel”, most Orthodox Jews deny the theological legitimacy of the State of Israel. For example:
http://www.nkusa.org/aboutus/zionism/opposition.cfm
At least you admit that DeMar’s is the old view. As for End Times Fiction, it is hardly polemical. Of course, LaHaye’s claimed hermeneutic becomes risible once it is actually examined against the Scripture and his eschatology, but that isn’t DeMar’s fault.
I knew Tim LaHaye, and he and his wife did some very important, wonderful things for the Kingdom. The eschatology that he imbibed and promulgated, however, is a mistake.
Your opinion. Believe as you want. I’ll be sure and wave to you as we’re being Raptured up to be with our Bridegroom.