First, it spends too much time on the background of Jonathan Wells. While it's interesting to know where he's coming from, his motives are less important that the "scientific" case he's making. His religious motivation explains WHY he gets the science wrong but the important point is that the science IS wrong.
Second, it does a poor job of explaining the actual scientific controversy over the amount of junk DNA in our genome. It almost seems to imply that scientists don't believe in junk DNA.
This is a complicated issue. I don't expect the IDiots to get it right but I do expect scientists to explain it correctly.