Since there are versions of the bible which acknowledge that the Verse that describes the trinity the best is actually a footnote and not a real verse raises questions on how easy it is to add or remove and change the bible even now. You can see the difference even now by checking the translations below
1 John 5:7 For there are three that testify:
What do you think about this?
1 John 5:7 For there are three that testify:
What do you think about this?