unchristian

adj

1. Not of the Christian faith.
2. Not in accord with Christian principles; without Christian spirit; unbefitting a Christian.

   “I hope I may never again be in a state of mind so unchristian as the mental frame in which I lived for some weeks, respecting the memory of Master B. [His bell rang] two nights out of three, until I conceived the happy idea of twisting Master B.‘s neck […]”

   “Arius […] eventually died obscurely, reputedly as the result of an acute attack of dysentery in a latrine in Constantinople, which circumstance afforded his enemies some unchristian pleasure, and was eventually commemorated with exemplary lack of charity in the Orthodox liturgy.”