They do go to church actually. All surviving species do. You were just so absorbed in your sinful activities that you never took the time to learn more about them.
Also dinosaurs were around for about 160 million years .... our species ancestors have only been around for about two million and the ones that even remotely look and act like us have only been around for about 50,000 years.
How do we know? Dinos ruled the Earth for 165 million years. Humans have only been around for 300,000 years. For all we know, Dinos might have even built spaceships and left the planet to colonize other star systems in the Delta Quadrant.
They ate, fucked, and generally dominated the planet for millions of years until they were taken out by an external factor.
How's humanity doing for comparison? We have cell phones, religion, racisim, mysogony, wars, and microwavable bacon. Oh, and we'll probably end up destroying ourselves because we choose to live where its either too hot or too cold.