God isnt real, so why believe in him?

Processes, even adaptations to environment have a beginning, a catalyst, a First Cause. The old chicken or egg first paradox? Eternal torment in hell after death (which is the cessation of the life process rendering one incapable of feeling torment anyway) is not a biblical teaching. Faith and religion are not one and the same. Scientists exhibit a measure of FAITH in the consistency of universal forces of gravity, etc. when planning explorations of outer space. Hate disguised as a political agenda caused WW2 and all other wars. All faiths did not endorse the Nazi regime. Do some research. As for why anyone believes anything, that is a personal matter and not for public examination but private contemplation.