“delightful” Is that some secret Mormon term for “full of it”...
No, I know that playing “gotcha” or cutesy comments is as Christian as it gets, but “delightful” in that context carries the meaning of “hoist by your own petard”.
You could use it when a Catholic explains that the religion of the attacking group caused members of said group to become Catholic. The same for Protestants, etc.
It’s ironic, no?