If people,want to believe in gods, ancestral spirits or reincarnation - fine. Just don't force it on others.
why am I an athiest? Simply because no supernatural entity has ever answered a simple question for me. For morality great role models and common sense answered those questions. For everything else science answered those questions and continues to do so. Those who put their noses up to science pick and choose which parts of science suits them to trust. I trust science because it expects nothing more from me than for me to question, learn, study and draw conclusions which I am allowed to change with new evidence - the exact opposite of "belief" or "adherence". There simply is nothing else in life which offers what science does for improving this planet and it certainly is my opinion that the only option for this planet's salvation is science. So why bother with anything else when it comes to matters of our survival or progress? Science does not disappoint - humans do. Yes, you could say science is my god because it does heal, fix, enlighten and it offers the best prospects for a better future - no diety has done for man what science has. EVER.