Christians take on the more nihilistic atheists

[robvalue]

Well, we can either assume we have some sort of real choice to make and discuss it, or else the word "should" becomes entirely meaningless. Almost all discussion about humans becomes meaningless.

We may indeed be making no choices of course. In which case this is just what I have to type.

But it's not been demonstrated we have no choices, so saying "no choices therefor no morality" isn't valid in my opinion.

Again, I'm not argueing for morality being anything other than a subjective value judgement by a thinking agent. It's not some mystical inherent property of matter or of an action. The value judgement is still happening, whether or not I have any control over the outcome. Of course it will all be coming "from me" and be based on me, that's just describing the process.