If the bible proves the existence of God, then Action Comics prove the existence of Superman.
Parents teach their children to look both ways when crossing the street. They tell them to look only one way when choosing a religion.
If 18,000 gods have been invented then it is likely that god 18,001 is also invented.
A deity who remains silent and invisible should not get angry or surprised at doubt of his reality.
A fundie claimed "God invented science". All of science is tentative and approximate, also sometimes mistaken. Is that the best God can do?
People who need to believe in deities can find them everywhere they look.
Christians think a long record of church attendence and Bible reading is equivalent to an advanced degree in science.
The point of existence is not to find the most powerful thing you can imagine and then grovel before it.
Fabricating answers to unanswerable questions is the domain of religion. A deity model is not the default alternative to a scientific mystery.