DH 22: Legitimate Differences

Despite a bit of rhetorical posturing by some of the supporters of the JEDP-Documentary Hypothesis, there are serious and legitimate academic differences on the matter.  One can reject the JEDP-Hypothesis without being an ignorant fundamentalist, whose opinions are purely ideologically driven.

Or do the Documentarians really want to claim that it is impossible for intelligent and informed people of good will who have seriously studied the matter to come to different conclusions about the validity of the JEDP-DH, and the nature of the sources of the Pentateuch?