That linked page starts off with the statement that the WWGHA website is anti-Christian. I disagree. It is not anti-Christian, it is anti-delusion, or pro-thinking.
The entirety of Christianity has been founded on apologetics. For it's entire existence, people have been "explaining" why Christianity is true. If it were actually true, very little explanation would be necessary, and very few people would challenge it. Christianity is apparently no mystery at all, as long as one believes it is true. But then again, for it's entire existence, Christianity has been a mystery revealed plainly to those who seek it, and wish it to be true.
It's truly a sad thing to see so many people wrapped up in what amounts to nothing more than mythology and superstition, belief in supernatural, odds, and heavy handed morals that make earthquakes, tsunamis and volcanoes look like pillow fights between six year olds.
The bottom line is this: all things that do not directly embrace Christianity, according to the site linked above, are anti-Christian. Pure non-sense.