Lots of logical fallacy.
Some rehashed anti-Catholicism (see the section on "Communion")
Lots of uninformed and erroneous prooftexting.
All of his arguments have been anticipated and explained, and/or debunked elsewhere over the course of the last two thousand years. There is nothing new under the sun.
Oh... one other thing. Were I a betting man, I would bet that the creator(s) of this site is a Preacher’s Kid, or otherwise someone who was (at least emotionally) fervently Christian then fell away from the faith.