Discussion (and excoriation) of GMJ is relevant to the purposes of this forum; Christianity is not relevant, which is why I advise minimising references to it and minimising also the use of Christian concepts and terminology. People here are (quite understandably) very sensitive to anything that smacks of preaching.

There is a forum where Christianity may be discussed with exes: it is AAA (Anything At All) and you can find the link circa the top of F8 page. However I would warn you that there are some very tough hombres (and hembras) posting there: don't even raise the subject unless you are very confident about your apologetics, history, theology, and writing skills. (I am pretty confident, but I still don't raise the subject. Other people raise it, and I attempt to respond.)

There are a number of exes who have become Christians and post on these forums. The most notable is probably Mickey the Pharisee (aka Padre Mickey), an Episcopalian priest with a ministry in Panama. I hope you encounter him: he's worth knowing.

Neville B