God Spoke to Jesus
Were there any witnesses?
(Jn 12,27) “I am troubled now. Yet, what should I say? ‘Father save me from this hour’? But it was for this purpose that I came to this hour. 28 Father, glorify your name.” Then a voice came from heaven, “I have glorified it and will glorify it again”. 29 The crowd there heard it and said it was thunder, but others said, “An angel has spoken to him”.
“But others said, ‘An angel has spoken to him'”, the others who were never there still say so (like all Christians today), but what counts is the live testimony of the crowd there who heard it and said it was thunder. The crowd there did not believe that it was daddy; they said it was thunder.
Jesus was simply exploiting everything around him, even thunder.