Is atheism the last faint hope of people who know they would never get into heaven?

No, it is not. Atheism is INTELLIGENT people.

That seems unlikely. If they doubted their atheism, why wouldn't they just say a prayer asking forgiveness, and pin their hopes on that?

No.

Perhaps you should invest in a dictionary, or learn how to look up word definitions on the internet.

no it is accepting reality rather than make believe fairy tales. :)

I know what heaven is supposed to be but I personally do not believe it is an actual place (God, Angels, Heavenly hosts hosannaing away.)  Same same with Hell and lakes of fire.

I do not fear I would never get in, I don't think anyone does.

YMMV, See your philosopher for more information.

News flash. There is no Heaven for anyone to go to. No more than there is an Olympus, a Happy Hunting Ground, a Nirvana, an Elysian fields or any humanly imagined paradise. 

Makes sense!              

No, it's intellectual honesty, but we all know that Christians have a strong need to feel superior.

Is Christianity the last faint hope of people who know they would never get into Valhalla?

(you can apply this to literally any religion's afterlife, and anyone who doesn't believe in said religion - complete non-argument)

No - atheism is an educated conclusion that people make when they are smart enough to know that fictional beings and places do not exist.