Why is The Biblical Verse Supporting 'Trinity' Controversial?

THE CLOSET VERSE REGARDING TRINITY IN THE BIBLE HAS BEEN THROWN OUT . The Verse in the Bible which is closest to Trinity and is often quoted by Christian missionaries is first Epistle of John Chapter 5 Verse 7 ... "**For there are three that bear record in heaven, the father, the word and holy ghost; and these three are one**" In the Revised Standard Version of the Bible, revised by 32 Christian Scholars of the highest eminence backed by 50 different cooperating denominations, this verse which is the keystone of the Christian faith has been removed as an interpolation, as a fabrication, as a concoction. According to them this verse does not exist in the original manuscripts, therby eliminating another lie from the English R.S.V... P. S : You can't have a word of God being corrupted like that?? Do you?