Sentence:  So, in his esteem, an "auto da fé" — an "act of faith," as the words mean — is "really" an act of faith — an act of such faith as the author of "Ecce Homo" approves — a most <WSD>Christian</WSD> act — a most humane act... 
Meaning of the word marked with <WSD> tags:  Kind, charitable; moral; (a term of approbation).