Well, I guess that's what we should expect from people who view science as as religion.
Isaac Asimov was one of these types.
He is considered by many to be one of the big three of Science Fiction.
While I find some of Asimov's works interesting, for the most part they lack the necessary fiction to make them entertaining enough to read.
Egg-heads may love his work, but for all his genius (and he certainly was) Asimov lacked the spiritual-character required to become extraordinary.
Science Fiction is not just about the evolution of man physically or technologically, for it to be truly forward-looking it has to take into account the political, religious, and spiritiual evolution of mankind as well.
And while Asimov certainly touched on these subjects, his atheism hampered his ability to truly connect with the spiritual and thus his attempts at addressing these issues comes across as wooden, amatuerish, and inexperienced at best.
However, his mastery of Science overshadows those shortcommings and thus put him with the great Sci-Fi authors without doubt.

Heinlen was a far better Sci-Fi author IMO due to the balance of Science, poltiics, and spirituality that he brought into his work.
Wells did the same thing before him.
However, few can compare to A.E. Van Vogt when it comes to Sci-Fi writing.
His Voyage of the Space Beagle being the pinnacle of Science Fiction works.