That would depend to a very large extent on the attitude and behaviour of the visitors. Obviously, our leaders would be shaking in their boots in the face of technology that far advanced, so they probably 🤞 wouldn't do anything stupid, like to try to attack the aliens. I'd like to think they would let the UN be the interface - if that's the right word - but am afraid that at least some nations' leaders would look for an "in" - some way to gain special favour for their own regime, and make us all look like sneaky opportunists.
That, however, doesn't apply to the armed lunatic fringes of every stripe, who would almost certainly do whatever the stupidest thing is in the circumstance: frontal assault. I assume they'd be vapourized, which wouldn't go down well with their compatriots. So, right away, we're bound to have frictions and fractiousness.
The scientists, creative people and their readers/followers/students would be thrilled, vindicated, euphoric and curious enough to piss off the aliens with unwanted attention.
Not as integrated units. They already have sects, sub-denominations and factions; those differences would suddenly grow into rifts. The Pope might be able to put a single voice to Roman Catholicism, at least for a short time, but protestants reactions would be all over the place, and soon at one another's throats. Muslims, too - at least two main factions contradicting each other, probably more like four or five. The Jews would probably be okay with it; top rabbis would be sent from several countries to talk directly with the aliens regarding their belief. Native populations with animistic traditions would be okay, too. I have no guess as to the attitude of Hindus and and Buddhists.
I wouldn't be surprised, though, if a great many marginal believers of all religions fell away all at once, and the power of religion generally were fatally weakened.