It's all about the religious literalism. One of the reasons mentioned there were based on specific scriptural references from a specific religion. That just defeats the whole purpose of universality, without quoting from any other, then this just becomes a perspective on the issue from a Christian perspective, or any religious denomination. However, the Christian perspective is very interesting and kudos to whoever wrote that article. Mind you, there used to be gnostic christians who beileved in a similar concept as this many ways onto the mountain to God. The fact remains that we cant really know if its all one path to the mountain of God till we get to the top. I'd like to share an interesting story with you that really reminds me of this situation.
A frog lived in a well. It had lived there for a long time. It was born there and brought up there, and yet was a little, small frog. Of course, the evolutionists were not there then to tell us whether the frog lost its eyes or not, but, for our story's sake, we must take it for granted that it had its eyes, and that it every day cleansed the water of all the worms and bacilli that lived in it with an energy that would do credit to our modern bacteriologists. In this way it went on and became a little sleek and fat. Well, one day another flog that lived in the sea came and fell into the well.
"Where are you form?"
"I am from the sea."
"The sea! How big is that? Is it as big as my well?" and he took a leap from one side of the well to the other.
"My friend," said the frog of the sea, "how do you compare the sea with your little well?"
Then the frog took another leap and asked, "Is your sea so big?"
"What nonsense you speak, to compare the sea with your well!"
"Well, then," said the frog of the well, "nothing can be bigger than my well; there can be nothing bigger than this; this fellow is a liar, so turn him out."
As someone mentioned in the World Parliament of Religions in Chicago, each of us see the world from our own different wells, based on our religion. This article exemplifies the Christian well. This is the basic difference between RELIGION and SPIRITUALITY. This article is interesting becuase it shows what religion does to us, it makes wells and ultimately, it divides. What about the different denominations of Christianity, which one is the real true one? The problem is that the more and more we look deeper and deeper into our beilefs we realize how different our beilefs are, and it goes to such a great extent that not one of us has the same EXACT beilefs in that area. Thats precisely what happens with denominations with in religion. The first classification is different religion, then it becomes denomination. The more and more we dig we realize that our beilefs are differnt thats why we have so many different beilefs within this one religion. So first we ask this question and the next question will be Are there many ways onto mountain to Jesus? This is the difference between religion and spirituality, becuase spirituality focuses on the main idea and it unifies. In the times of ongoing holy wars, this doesnt really help, because we just start to differentiate between our different "wells" persay. My point is that this question will just start to lead to more specific questions and we just cant really properly answer this question right now. That response from the article was simply a view from another "well" or religion.