Not one person has so far said "Maybe he is right". Why? Because everyone is certain the universe is not an illusion, and they KNOW for certain that God cannot exist.
What if one can influence events by positive determined thinking? It would mean that all of you get your wishes to live in a purely physical world.
And what if I am right? It would mean that theists have an evolutionary advantage and are using one of the built-in elements of intelligent design to their advantage. Atheists will eventually die off. There will be no monuments or places of worship for future archeologists to find to prove that atheists even existed. The theists will burn their books and their mark on the world will not exist.