By and large Conservatives write books these days to amuse each other, not to actually promote ideas or present coherent arguments for policy prescriptions. And most certainly not to convince the unconvinced. It's something of a cliquey parlor game, that's all. By that token, Liberal Fascism has all the gravitas of a book of tawdry limericks, all of which start and end with a different letter of the alphabet. It's argument is as convincing as one of those mathematical "proofs" that shows :2 = 4, thanks to a little division by zero slight of hand that goes unnoticed by the innumerate and uninitiated, but which elicits little more than a yawn from anyone with more than rudimentary knowledge of the subject.
The sad thing, of course, is that the end result of "proving" that liberals are the true inheritors of Hitler and Mussolini's political legacy, you reduce the essence of Fascism to such commonplace ideas as Keynesian market stimulus and the promotion of organic foods, while aspects such as the ideology's racism and militarism are seen as trivial, secondary offspring (given that they find little support in contemporary "Liberal" ideology).