There are a few people–and whoever is behind this website is one–who have gone off the rails due to an overly-literal interpretation of Acts 4:12:
“Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.”
They take that to mean ONLY the original Hebrew name of Jesus–often spelled in English as “Yeshua.” They believe that even translations of the name are invalid; so no God; no Dios; no Jesus; and so on. From another page on that website–
Beyond that, I mentioned in another thread that the doctrine of the Trinity is written into the very fabric of the Bible. “Elohim” is a plural word (which means, based on Hebrew grammar, that it refers to 3 or more) and yet it takes a singular verb. That fact alone is enough to absolutely prove the doctrine of the Trinity beyond the shadow of any possible doubt.