Why are you saying his faith is weak when he’s pointing out logical fallacies in the current mindset? He’s said nothing about his own faith, beliefs, or opinions.
In other words, what you’ve done is a cousin of the fallacy of saying “you’re wrong, so I must be right.”
Not at all.
As I read the post, the original poster claimed that science follows a certain “logical” process. He was wrong in his specifics.