Atheists who become Christians

[robvalue]

No one has ever given a reason that they can defend as rational, as far as I'm aware. Doesn't mean they have no reason, people don't always do things for rational reasons.

What a "good" reason is depends entirely on who is assessing that reason. It's obviously a good enough reason for them to convert, in their opinion. That doesn't make it objectively a good reason.

If anyone does have a rational reason, I'll be all ears. You could argue that a pragmatic reason is rational of course. I'd accept that. But that's explaining your motivation for converting on paper, rather than defending actual belief.