Good question. I think I have a greater and a lesser purpose. The lesser is to try to attract attention to the fact that there has been a lot of 21st century research into the Shroud, which it is a shame that so few people are aware of. The greater is a more general campaign against the woolly thinking, selective use of evidence and occasional deliberate misrepresentation of religious fundamentalists generally. There seems to be a general decline in Christian religious adherence, which the increasingly rational stance of the Church is doing its best to maintain, but there is a powerful body of irrationalists who, rather than attract people, actually deter them. I do not believe this is because of their faith as such, but because of the irrational way they occasionally bolster it with pseudo-science.
By all means let people believe in the authenticity of the Shroud. By all means let them honestly explain why. If there is truth in what they say, it will come out eventually. But by coming across as mean-spirited in attitude and misrepresentative in evidence, their attempt to ‘speak to all nations’ will prove thoroughly counter-productive. I think that my steady presentation of easily confirmed evidence, and logically presented conclusions from that evidence, coupled to my unswerving faith in the Church, will do a lot more to win people to it than intemperate blustering.