Theists should be overjoyed at the scientific advances of the last 500 years. They should be ecstatic at the wondrous ways in which science has enlarged the scope of our Universe, uncovered the marvelous complexity of the cosmos, revealed the mechanisms by which our atoms are forged, and detailed the fantastic intricacies of living organisms. Science has given us an amazing understanding of the physical, chemical, geological, and biological wonders that fill our Universe, understandings that dramatically increase the size, scale and beauty of our world and the Cosmos.
The ancients clearly believed that humans were special, were chosen. They believed this because they had no understanding of the size and scope of the tiny planet they inhabited, let alone the Universe they lived in. The ancients believed that Earth was the center of the Universe, that the sun orbited around it and that the stars were merely fixed scenery. In that kind of Universe, the preeminence of humanity was clear, uncontested. It was in that kind of Universe that the tiny gods of old were forged, gods who actively discriminated between groups and tribes based on petty liturgical or doctrinal distinctions. In that kind of Universe, god is merely a few existential steps above humanity, god of the solar system.
Their Universe was painfully small, and as a result, the gods man made were painfully small as well. They are petty, parochial, jealous entities. Interplanetary Santa Clauses handing out punishments to those who are 'naughty' and rewards to those who are 'nice.' Such a conception of divinity was appropriate when our conception of the Universe was a set of concentric spheres fixed about an unmoving Earth. Such a conception of divinity is wholly misplaced now that humanity has seen what it has seen and knows what it knows.
Our Universe is incomprehensibly larger than the ancients ever dreamed of, so large that it makes the ancients' conceptions of god laughably quaint and ridiculously small. Theists should be elated that their god is now sovereign over something so much vaster than we ever could have imagined - yet it fills them with dread instead. Because in showing how vast the Universe truly is, in showing how life can form absent intervention, in unlocking the secrets of the origins of time, space, matter, atomic structures, science has shown how truly inconsequential humanity is, how irrelevant we are in any greater cosmic sense.