Seriously, this is not amusing.
But you ask a serious question:
The article points out that early in life Darwin had considered entering into religious orders; but apparently decided he hadn't the calling to do it. The point is, in his early life, Darwin was a Christian. And it is obvious that somewhere along the line he lost his faith. Why?
A reasonable hypothesis, based on his own writings, is that he was in grief over the loss of his favorite daughter, age eight.
That is my conjecture, js1138. FWIW
Since when was a belief in God necessary to become an Anglican clergyman, anyway?
Note to the humorless; in the UK, the C of E is the butt of humor in the same vein as used about the UUs in America. The Anglican clergy was archetypically where the upper classes stowed those sons who were too stupid to be active in public life and without the physical attributes necessary for the military.