For me, the wonder is that people like Remy feel that their love of Jesus somehow hinges on espousing this stuff.
I think it is more psycho-dynamic. They have been told (not one actually from the Bible, but rather from religious authorities) that the bible is literal and inerrant. The scientific word disputes that view. They must maintain their belief as cognitive dissonance develops. They come here to argue to decrease their cognitive dissonance. Fairly literally they argue with us to quell the argument going on within themselves.
There is a very high COST (psychological) to changing beliefs. And as long as they have an argument (and it does NOT need to be a GOOD or even rational argument) they don't feel the pressure to change beliefs.
Remember, in their view their whole life and their whole immortal life is predicated upon this belief system. Their friends and family often go to the same church. Their self identity it wrapped up in it.
They are like wild dogs that have been cornered.