[Hulka]

Reference your question as to what the population response would be to an Alien contact, Col John Alexander (PhD), and others, wrote scholarly on this subject:

http://www.ufoevidence.org/topics/religion.htm

http://www.nidsci.org/articles/alexander/statistical_analysis.html

and

http://www.nidsci.org/articles/alexander/response_analysis.html

and

http://www.nidsci.org/articles/alexander/survey_religion.html

etc.

Findings indicate no massive spiritual rupture or mass panic.

[TaraP]

Thanks I will take a look...

I believe if people thought they were Aliens from another Galaxy that would cause intrigue and curiosity

However:
If people thought those Aliens were Demons sent by Satan there would be mass panic and chaos....