I haven’t bothered read the linked page, but don’t go to Zaragoza (Spain) around October 12 and tell the locals that you don’t believe God heals amputees…
the Miracle of Calanda happens to be a double amputee growing back both legs. And the Fiestas del Pilar are a time when even the most atheist local is inflamed by either alcohol or religion and not likely to look kindly upon outsiders coming “to tell us what to believe”.
It is logically supported by the verses where Jesus says prayer WILL work. Accepting Jesus’ words in the bible as authoritive and acccurate is the piece which makes this logical leap possible. Jesus says intercessory prayer can literally move mountains, and moreover, that it WILL if it is asked. Yet it does not work. How can an aspect of the godhead be wrong, given the model for god laid out on the site? Answer: If that person is not an aspect of the godhead, or if there is no godhead.
Even if you were not you must be aware that many people were raised in one religion or another and decided to become an atheist/agnostic based on a rational look at the evidence. Why should we think it pointless to reason someone out of their unjustified beliefs when reason is the way so many others left behind their unjustified beliefs?