If they are not going to believe,they are not going to believe,and Jesus said if they do not hear the word of God they will not believe even if one rose from the dead and told them.
Anybody can actually go against any group of people and appear to find fault with them,what are we going to do,for if they do not believe the Bible,how can you refute them,for they will say what they say,for the only way to stop them is if you bring up scriptures that they say hey that is truth,or they see a miracle they cannot refute,but you have to let off,which God says avoid foolish and unlearned questions,and it is better to not even discuss anything with them,and do not reprove a scorner lest he hate you,and God does not like strife between people.
Atheists have a different reality,and they will go by that.
That is what I do not like about people that claim to be with Christ,and then they are on television debating with people,but have little knowledge of the Bible.The world will bring up almost anything to try to prove they are right.
Prophesy would be the best way to prove God's word is true,which God said in Isaiah 41 that He identifies Himself as the true God by showing the whole history of mankind,and no other religion or person would be able to do,but it is still unlikely they will believe.
It is better to leave them alone,or post a few scriptures and get a move on,because God does not like us striving with people over His word.