Religion and alien life cannot coexist, since the discovery of alien life would mean the end to major religions like Christianity and Judaism. Recent surveys have proven that even though many religious people believe in the existence of aliens, or that their beliefs would remain unaffected by the confirmation of alien life, the numbers are significantly lower than those who do not believe in life on other planets. The existence of aliens contradicts many religious theologies, meaning that religion would eventually die out as research on alien life progresses.
Many religions are also at odds with science. The discovery of aliens would be one of many scientific claims rejected by religious communities, much like climate change, the age of the universe, and evolution.