When it comes right down to it, there doesn't seem to be any way to prove conclusively that it is or is not the image and bodily fluids of Jesus Christ.
So, those inclined to believe will have room for belief, and those who don't wish to believe can dismiss it. That is the way I prefer it too.
I agree, not even to the level of proof available that W won Florida in 2000. The best we can hope for is that objective efforts to disprove it fail to dissuade believers and that what evidence for it there is makes any alternative explanations suggested seem at least as implausible to non-believers. Faith can bridge the former and the latter permits faith to grow. Faith is good, but faith isn't always accurate. As illustrated by 53% of last fall's electorate.
I think that is the power of God, He gives us just enough to force us to have faith.