Who caused god? Why can't the universe or cosmos be eternal and leave god out of the equasion.
Nothing "caused" God... this has been explained to you a thousand times. Does it make you feel better to ask it again and again? God is spiritual, not physical... there is nothing to cause. Physical was caused by Spiritual, it's the only way Physical can exist. Physical didn't start itself, matter can't create matter, energy can't create itself.
The universe cannot be eternal unless Isaac Newton's Laws of Motion are incorrect. The universe is in motion. According to Newton, something acted to set it into motion. If it's in motion and something set it into motion, it had a beginning. Then, if this isn't clear enough evidence... we have the law of thermodynamic entropy. This totally contradicts an eternal universe.
Now you can certainly BELIEVE the universe is eternal and God can't exist because something would have to create an omnipotent spiritual energy... but these are FAITH-BASED opinions.