Suffering, and Darwin's loss of faith

Alerted by a tweet from Richard Dawkins, I read this is the Guardian:

Darwin's complex loss of faith

It wasn't evolution that led Darwin away from religion, but nor was it simply the loss of his beloved daughter

[...]

In reality, Darwin's loss of faith was, as he recognised, gradual and complex. The reasons were not new – suffering always has been and always will be most serious challenge to Christianity – but they were newly focused. Plenty of Darwin's scientific contemporaries, men like John Stevens Henslow, Charles Lyell, Asa Gray, George Wright, Alexander Winchell, and James Dana, could accommodate their Christian beliefs with the new theory. Indeed, as historian James Moore has remarked "with but few exceptions the leading Christian thinkers in Great Britain and America came to terms quite readily with Darwinism and evolution."

But Darwin, brought up on William Paley's harmonious, self-satisfied vision of creation, could not.

(My emphasis.) I'd go along with that, but also note that suffering is at the heart of Christianity in Christ's suffering on the cross. Sort of obvious, and yet somehow it gets forgotten.