I'm not sure that anyone has claimed that that is a irrefutable fact, Gordon.
I think some of your fellow Christians do, but for those who don't then their faith is really just opinion, so that their justification for holding this opinion should surely be amenable to assessment, and this requires a method that can provide a meaningful basis to accept or reject what is claimed - this method seems to be unavailable in spite of Christians claiming they have supporting evidence for their opinions.
What they have argued is that given all the evidence on both sides of the debate, they believe that it is more likely than not.
Then 'they' are naive or are liars, probably more the former since 'likely' implies probability, and since probability is naturalistic then their claims should be amenable to the scientific method, which is based on the assumption of naturalism. It isn't though, and since the 'other side' (theists) have no comparable method that is specific to non-naturalistic claims involving what is 'likely' then they have no evidence that is amenable to a methodological review: however, their claims of evidence fall neatly into the variety of fallacies upon which all their arguments depend.
After all, all you and others like you have been able to do is produce 'normal' evidence, and we all know that for normal to be where it is on a spectrum, there have to have been 'extremes' as well.
Normality undoubtedly has its known 'extremes' that are quantifiable (hence they are considered to be 'extreme' based on stated characteristics): weather is a good example, especially given recent rainfall levels in parts of the UK - but here you seem to be conflating evidence-based 'extremes' with 'supernatural' claims, which is a
non-sequitur in the absence of comparable methodologies.
You guys do love your fallacies!