OK, as a non-believer....
The first thing that'll happen is all the religious people will declare 'it' a false prophet because it doesn't comply with their religious beliefs.
Then there'd be a TV bidding war to get exclusive rights to the interview.
Trump of course will be calling it 'Fake News'
Non-believers will be very skeptical, certainly wanting this being to jump through a few hoops to prove its claims. Once they are convinced, non-believers will listen to what it has to say, ask questions, interrogate. If it demands worship, it'd probably lose me there and then.
Be very interesting though.
Yes, that is the first thing that happens, religious leaders from older religions reject the new messenger, and then because they reject him, the followers of those religions follow suit and reject him too. It is a rare person who thinks for himself and investigates the claim of the new messenger.
Matthew 7:13-14
Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it.
Most people enter through the wide gate and follow the road that leads to destruction... It is easier to walk through the wide gate and walk the easy road that is behind it because people do not have to think for themselves, they just follow the crowd. It is also easier for people to have many others who agree with them rather than just a few.
In many ways, nonbelievers have a leg up on believers because at least they are not mired in religious tradition. However, most nonbelievers have confirmation bias because most were raised in a religion and dropped out, so they employ the fallacy of hasty generalization and assume all religions are the same, false. That of course would also imply that all messengers of God are the same, false.
For example, if a person travels through a town for the first time and sees 10 messengers, all of them false, they may erroneously conclude that there are no true messengers that represent God in that town. However, maybe they just did not look hard enough or in the right neighborhoods.
So that is what nonbelievers do, they don’t look at the evidence at all or if they do not look at it hard enough or they look at it with confirmation bias.
The messenger never demands worship. Only God demands worship, not because God needs it for Himself but because it is beneficial for humans. Worship means love.