The DI certainly is obsessed. They recorded Olson at a screening of Flock of Dodos, and are now claiming that he backtracked on Haeckel’s use in textbooks. It’s only backtracking if you accept the DI’s false premise that he claimed in the movie that there was absolutely no sign of Haeckel’s diagram in biology text—a claim I’ve already shot down.
If they want to claim he backtracked, they should just quote the movie—you know, the part where he says the diagrams aren’t found in the textbooks “other than a mention that once upon a time Haeckel came up with this idea of ontogeny recapitulating phylogeny”. Does qualifying a comment in the same sentence count as “backtracking”? To the DI, perhaps.