For this hypothetical, let’s say it’s not aliens actually visiting earth. But let’s say JWST finds a planet maybe a few hundred light years away, and we can see lights and cities and maybe spaceships or stuff like that around it. So no contact, but 100% proof there’s intelligent life out there. How would humans (and different groups of humans, like conservative Christians) react to this?
Honestly, don't think most people would care outside of some gossip. An alien civilization we will likely not make contact with for 100s of years wouldn't affect most peoples day to day lives.