I declare the end from the beginning, and ancient times from what is still to come. I say, 'My purpose will stand, and all My good pleasure I will accomplish.' (Isaiah 46:10 BSB)
In this YouTube video, Richard Dawkins admitted in an interview with Peter Boghossian that no evidence could ever convince him that God exists, even if God spoke to him audibly and wrote a message to him in the stars.
So how did God prove Himself to be God? God proved that He is God by establishing the nation of Israel and foretelling their history in His revelation to His prophets. Anyone can do a miracle or write a book. Only God can create a nation and tell its history in advance.
Indeed, ask now from one end of the heavens to the other about the days that long preceded you, from the day that God created man on earth: Has anything as great as this ever happened or been reported? Has a people ever heard the voice of God speaking out of the fire, as you have, and lived? Or has any god tried to take as his own a nation out of another nation - by trials, signs, wonders, and war, by a strong hand and an outstretched arm, and by great terrors - as the LORD your God did for you in Egypt, before your eyes? You were shown these things so that you would know that the LORD is God; there is no other besides Him. (Deuteronomy 4:32-35 BSB)
Who is like me? Let him proclaim it. Let him declare and set it before me, since I appointed an ancient people. Let them declare what is to come, and what will happen. (Isaiah 44:7 ESV)
Everything I prophesied has come true, and now I will prophesy again. I will tell you the future before it happens." (Isaiah 42:9 NLT)
Tell us the coming events, then we will know that you are gods. Indeed, do something good or bad, then we will be in awe when we see it. (Isaiah 41:23 CSB)
All the nations gather together, and the peoples assemble. Who among them can declare this, and show us the former things? Let them bring their witnesses to prove them right, and let them hear and say, It is true. (Isaiah 43:9 ESV)