If aliens from another world visited Earth, what effect would it have on the world's religions?
It would not change anything. Alien civilizations from Earth like planet would be humans or humanoids; they may be more interested in experimenting on your species scientists who are so arrogant that they don't know where to shove their PhDs. Since the 60's, the scientists of your species made absolutely no technological advances in anything. Everything you have is still the remnant repercussions of the achievements of 60s. Take your aircraft technology - 60s. Your car technology - 20s' unto 60s'. Spacecrafts - 60s. So, from galactic standpoint, alien civilizations would love to experiment and find out what these good for nothing PhDs are all being arrogant about all the times.