Muslims don't celebrate the birth of Muhammad. Buddhists don't celebrate the birth of the Buddha. Why must every religion be most like Christianity in order it be "well thought out"? There's even the Jehovah's Witnesses, they don't celebrate Christmas/birth of Christ either. But they believe in Jesus. Christianity as a whole isn't even "well thought out".Satan can be worshipped in a temple but is too humble to have a holiday focused on his birth? The Satanist religion isn’t very well thought out.