"On atheism there isn't any reason to think that humanism is true. Humanism is a faith commitment to the value of human beings in an atheistic universe.William Lane Craig, Atheistic Anti-Humanism podcast
And here my sympathies are entirely with the atheistic anti-humanists; namely, given atheism, I just don't see any basis to affirm that humanism is true.
Humanism historically is rooted in Christianity. It is because we are made in the image of God that human beings have intrinsic moral worth and God-given human rights. But once you remove God from the picture then all you're left with is the blind evolutionary process with all its contingencies and variabilities and instabilities and no basis for affirming humanism is right after all."
The podcast was a response to this article: The atheistic critique of humanism has been all but forgotten