One’s avowed beliefs actually have very very little to do with what happens to them in this life or the next. The beliefs are a product of a person’s background, upbringing, and spiritual development. Only the third of these factors are present with the person at birth.
The Christian religion, for historical and social purposes, has created a fiction that everybody goes to heaven or hell, and announced that only Christian authority could announce how, even if they cop out of the responsibility by saying it’s up to God.
It doesn’t take a lot of historical reading to discover just how silly this is. During the 1600s the Church needed money, a lot of it, and so they got very comfortable selling access to heaven.
Most people, when they undertake the spiritual journey we know as mysticism, find that religious concepts and rules and laws, only vaguely apply in that realm. Our world is concrete and its rules unbreakable, so we assume the world after is similar.
But no, God’s plan for atheists is the same as His plan for all. To love and provide unconditionally. Eternal existence is all of our birthright.
One of the important distinctions Jesus taught was that it is possible to be dead, right here on Earth. Jesus offered life, spiritual life. Just because you’re existing here on Earth, doesn’t mean you’re alive while you’re here. If you follow Jesus, his teachings, not their letter but their spirit, then you can have life, eternally.
From a divine perspective, this world is the same as any other. It’s us who, like fish in water, mistake the water for all that exists. Divine rules hold, but rules that require all this water to be around doesn’t once the water goes away.
And our perception is hopelessly governed by the water, even when you undertake the mystic’s journey.