On the lunacy of free will

[Spongebob]

You people care about proof too much.......and the afterlife isn't solely a Christian idea, many religious/spiritual schools of thought include an afterlife.

Any why shouldn't we?  Does that strike you as somehow bothersome or strange?  Humankind has been searching and asking questions of the expanded universe for as long as we have historical records.  This includes everything from medicine to power to spirituality.  Why would we be any different now?  Why is searching for truth and reality a bad thing?  The sad people are those who accept children's stories as truth when the evidence and human history are stacked against such immature fantasies and those who are so delusional that they believe they have some connection to an omniscient being because of an overactive imagination.

The afterlife is a multitude of ideas spanning all of human history and this history includes the idea of no afterlife at all, so atheists aren't new to this idea.  Our modern concepts perhaps put a little different spin on it, but we certainly didn't invent the idea.  And as others have pointed out, the modern ideas of heaven and hell are not ancient, but were formulated mostly in the late Roman Empire and later medieval eras.  And they have continued to evolve into the modern era all based on interpretations of stories with no objective evidence at all.  And this isn't even scratching the surface of newly invented ideas of the afterlife, such as the Mormons and Scientologists, again, all invented from human imagination.  To believe in just one of these religious modalities takes nothing except the willingness to ignore objective reality and give yourself over to the will of others.  To resist takes disciplined reasoning and often enormous courage.

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Interestingly enough , "jesus" didn't.  That was an effect of romanization, as I think we've discussed.  At any rate..and since you have a pronounced "many people believe" habit...many people can be wrong.

There is no afterlife.  No heaven, no hell.  These are thematic elements of greek tragedy that got rolled into christian belief in the scuffle for political power in rome.

If most people believe in something, how likely is it that they're all wrong? Versus how likely it is that the naysayers are wrong?

That's called the fallacy of popular appeal.  Just because something is popular doesn't in any way guarantee that it's real or genuine.  All it means is that the idea is popular.  I could give you tons of examples but you never seem to be open to actual logic or reason so I suppose there's no point.