What if you’re wrong?

I am often asked this question by believers when talking about belief in God, “what if you’re wrong?” I do admit that it is definitely a fair question and so it deserves a fair and honest answer.

My answer is:
I believe in humanity, happiness, fairness, justice, equality, honesty and humility. I would like to see everyone to be happy and treated fairly, irrespective of their gender, religious beliefs, sexual orientations, caste and color amongst other things. And more importantly, I believe that everybody should be allowed their fundamental rights to say what they want, live the way they want and whoever they want to live with. All these are important and real issues and principals of humanism. These matter. Not having a blind belief in a God allows me to hold these very real principles as sacred and in a way devoid of any prejudices against any groups of people who might be different from me and hold principles different from mine.
If I am wrong about the God question, then it doesn’t really matter because I have still lived for real causes, real people, real happiness, real fundamental rights, real freedom from oppression. And these would have still remained equally important whether god existed or not because if he did, and he is half as good as you claim him to be, then I can be sure that I would be okay in his eyes because I still advocated for very real issues which were of a more pressing concern in my world than taking time out to worship an omnipotent and omniscient ultimate entity – something that simple logic definition becomes needless – or spending my energy on persecuting people who held different beliefs from me or had a sexual inclination that I did not approve of.
So, if I were wrong, I wouldn’t have lost out much in life anyway because I would still have been the same person as I am today. And if there turned out to be a god who’d still punish me for not worshipping him, then I submit that we would already be living under a supernatural dictatorship – an anarchy if you will – the nature of which would in itself indicate doom for humanity and the universe.
But you, a believer, have lived and dedicated your entire life to an assumed entity that you had no way of knowing for sure. And you don’t possess any special mental and physical faculties that I don’t so you cannot claim to have a way to know that I cannot. And because of your belief in that assumed supernatural entity, you have decided to live by a code which is based on compulsory love and extreme fear of the same entity and which makes some of you do really really horrible things to really really sweet and innocent people -things which someone with secular mindset could never even dream of. What about the sufferings you could cause in the world by following religious dogmas that persecuted people because of their beliefs, sexual inclinations and who they loved.
So, now i ask you the believer, what if you’re wrong? Haven’t you missed out on the most important things in life itself while thinking only for something that didn’t even exist?