Folkbabe, you're right about the Reichstag fire. But notice that none of his other information is derived from the idea that the building is blown up--it makes the same sense whether it was blown up or burned. Therefore it is entirely possible that all the other information is correct, though I can't prove it one way or the other, and he simply misspoke.
And yes, if the Reichstag fire were faked (I've never heard of the scholars who say it wasn't either) then it was certainly done to stir up anger at Communists so as to aid the Nazis. That does not in any way discredit the author's point that the modern left resembles the Nazi party of old more than the right or the libertarian movement. The Nazis certainly were Socialists in the sense that they believed in central concentration of power and wealth in the hands of the state. Their opposition to Communists was mostly a matter of looking good to their followers, who hated Communists and Soviets, and of sticking it to the U.S.S.R. at every opportunity. The many Socialist governments of Great Britain over the years also denounced Soviet Communism and even played the Cold War game, but that didn't make them any less Socialist.
The point the man is trying to make is that the Nazis would applaud a lot of things the left wing of American politics considers its bread and butter. Abortion as birth control, disarming the population, active suppression of religion, political indoctrination in schools, the gradual movement to disregard the rule of law in favor of letting elite politicians bend, then twist, and finally destroy the rules and laws so carefully laid out in a written Constitution, warrants being served by assaulting homes as if they were military targets, random stops of travelers to check registrations and search for contraband substances, the changing of election rules after the end of the election in an effort to be sure the "right" candidate wins, using the power of the federal government to investigate, harass, defame and sometimes ruin political opponents, and the treatment of the written Constitution which is supposed to be the explicit and unchallenged law of the land as "a living, breathing document" which is open to "interpretation."
Republicans do these things too, at least some of them. That doesn't mean they aren't despicable, and it doesn't let the left off the hook. And no one has managed to provide one example of George Bush's "Nazi" characteristics, or those of his campaign.