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?
Off topic but I bet that JWST will find concrete evidence of life (various bio-signatures), but will not find evidence of technological life.