It is understandable that Christian commentators want to denigrate atheists. A common tactic is to claim that atheists think that most Christians are Biblical literalists and thus only criticise fundamentalist and literalist religion. The atheist is thus painted as naive, not very thoughtful and a bit ignorant. The tactic also implies that atheists have not managed to produce significant critiques of liberal religious theology.
This is mostly wrong; atheists are well aware of liberal theology, and nowadays most New Atheistic critiques address liberal theology (literalist theology is simply not a worthwhile target any more; I can’t think of anyone bothering since Tom Paine’s Age of Reason, as long ago as 1807).