While its possible that people may think that about him, in the comics he has gone out of his way to tell people not to worship him, and that he is not a god.
Also, he is not the first Superpowered being in the DCU to show up on earth. Just one of the most powerful.
Facts are verifiable information.
Superman being based on Jesus is NOT a fact.
His creators were actually both Jewish. Not that Superman is Jewish, but he certainly was not intended to be Jesus.
It has also be stated, multiple times in the comics, that his is not a god. He is not omnipresent, omnipotent, or omniscient.
He cannot be everywhere at once, cannot alter reality with a thought, and is not all seeing.
Superman also is limited to saving your life, he cannot grant forgiveness for a sin, or save souls.