Rejection of religion isn't rejection of faith. One can be an atheist who believes in the strength of encryption, for example, but their belief is just that: a belief. There is no proof that P ≠ NP, and thus actions done with that underpinning are led by faith. Human action and growth have to be driven by faith in something; otherwise, we wouldn't have the will to do anything.

What rejection of religion is is a denial of a human construct of control that, regardless of how benevolent and pure its foundation claims to be, has without fail been used to subjugate and divide humanity. Religion can be useful at an individual, self-actualizing level, but that utility breaks down and is higly likely to become corrupted at a societal one.

Humans are inherently moral and driven to act in their self-interest, which, when taken to its maximum, is actually a collective interest. Every day we evolve to work and fight with one another to reach a point of pure oneness; it's just a volatile path to get there. There doesn't need to be a "God" to tell us this; we're all a sliver of the universe, a realization of its consciousness, part of a greater whole, and the crowning of a higher class of entity denies us the agency to live that reality to its fullest.