Oh, no, not another "rant" comment. Can't you people at least be original?
A lot of people also agree that the sky is blue and water is wet. It
is a rant. Atheism can be just as ignorantly dogmatic as the most throwback-laden forms Christianity. I'm firmly agnostic, and I don't have a dog in this race. I don't feel like going through what is obviously a non-objective piece of writing in thorough enough detail to enumerate all of the logical fallacies--the quality of the writing doesn't really sustain that kind of analysis.
However, I'll list a few that can be found in even a cursory once-over of the "article:"
Argumentum ad logicam,
Argumentum ad nauseam,
Argumentum ad Hominem,
Argumentum ad ignorantiam,
Argumentum ad populum,
Argumentum ad novitatem,
Converse accident / Hasty generalization,
Petitio principii / Begging the question, Circulus in demonstrando
Complex question / Fallacy of interrogation / Fallacy of presupposition
Ignoratio elenchi / Irrelevant conclusion
Fallacy of division
Affirmation of the consequent
Denial of the antecedent
Bifurcation
Plurium interrogationum / Many questions
Red herring
Straw Man
You can find good explanations of these in the Constructing Logical Arguments FAQ--part of the old Alt.Atheism FAQ collection. This is a document that was originally written to try and improve the quality (read: intellectual sophistication) of the debate on alt.atheism and USENET in general.
I'm going to link it here, because I think many of the participants in this thread might find it interesting both because their content is good and very even handed but also because they are a piece of Internet culture from the early years that show how long-running and controversial the debate over religion and atheism has been since the days of USENET.
It's a very good document just in terms of a critical reference, I've found it to be useful in sharpening my thinking in developing academic work. If nothing else, it provides very useful encapsulations of the classic logical fallacies without having to pull out a volume of philosophy or rhetoric.
Whatever you think of what I'm saying, or where you stand on this debate (or don't care about it at all) this FAQ is one of those jewels of Internet lore that's worth saving, printing, keeping around, and showing to people. There are expensive textbooks out there that are less informative.
Alt.Atheism FAQ: Constructing a Logical Argument ( 1996 edition mirrored. )
Here, also, is the "About Atheism FAQ" that used to circulate on alt.atheism:
Atheism: An Introduction to Atheism
I find this to be a MUCH better atheist 'rejoinder' to dogmatic, evangelizing , proselytizing or otherwise hostile Christians than the "article" linked in the original post above.