We've all had that one person
Crazy people are crazy all the time. They're not like Hamlet, who said to Horatio, "I am but mad north-northwest; when the wind is southerly, I know a hawk from a handsaw." Hamlet means he's only pretending to be crazy. But crazy people, even in their more reasonable-seeming moments, are only pretending to be reasonable. Underneath it all, they are still crazy, and everything you tell them is understood and acted upon in the same, crazy way.
So trying to satisfy the demands of a crazymaker in your life, or your church, is useless. Crazy people gotta crazy. The only appropriate answer when they ask you to justify yourself is, "What part of NO
don't you understand?"