I wouldn't think too hard about it, as the author is a known loon. I just took him to be saying that "Al Jazeera is very influential because it's very good, but it's dangerous that it has no serious competition in many parts of the world, because it's very sure of its positions." I'd agree that there needs to be another global, non-western news source.
I like it, not because of any editorial slant, but because it covers parts of the world ignored even by the BBC, and because it actually shows a lot of pictures of the world, instead of one talking head after the other. (I don't know why cable news even has to be on TV. They don't take advantage of it, and just show old people in boring clothes talking all the time.)