Extraterrestrials are not what you think.
The Bible mentions God creating angels and humans. The Bible does not mention God creating beings on other planets.
There are good angels and bad angels (demons).
Some of these bad angels disguise themselves as extraterrestrials to deceive humans into believing in false doctrines.
This is why you get false and confusing doctrines from them. Their job is to hide the truth.
ET are actually bad angels or evil spirits in disguise.
"But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed!" (Galatians 1:8)
"No wonder, for even Satan disguises himself as an angel of light." (2 Corinthians 11:14)
Please see more information from this video that explains how alien abductions can be halted by the name of Jesus: