Do I believe Atheists are going to hell?

[vulcanlogician]

Agreed. Plus that, some atheists do believe that morality is objective-- so you theists don't have a monopoly on that by any stretch. 

And such proposed foundations for objective morality are open to the same level of scrutiny at theistic proposals. I personally find them them rare, inadequate and poorly grounded. YMMV

Yeah, a lot of people would agree with your assessment.

I personally think Plato did a pretty good job. G.E. Moore as well with his Principia Ethica. Just because an argument isn't easy to make, doesn't mean it isn't a position worth defending.