If there was irrefutable evidence that there was no afterlife it would be good news. However, it is highly unlikely that when you die you move on to another dimension, I think death is the end of the story.
I don't think the so called, 'second coming' of Jesus will look like anything as it isn't likely to happen. I believe he died over 2000 years ago and stayed dead.
Many religious people claim some sort of moral high ground so they are rightly criticised when they commit crimes like those associated with the Catholic church.