Is it wishful thinking to believe there must be a god as there would be no justice for unpunished criminality?

I'm sorry if this is not an appropriate question for this site, and i apologise for the lack of depth to my belief in a God. I know nothing of the bible but i have faith there is a god. I have stated the above as the basis of my belief in God on other websites and have been told by atheists that such a belief is wishful thinking. I have responded to their comments as to why an atheist would wish for oblivion in death?. Is this a good rebuttle of their statement that I am wishful thinker?