It sounds like the OP needs to meet more atheists. I can't think of another atheist I have met that could be described as materialistic. The same can't be said for religious people. Regardless, I don't stereotype them as more interested in their possessions and physical comfort than what is right or wrong. Since when are humans not animals? Morality, like many other things, was co-opted by religion.
I'm saying if one believes the material world is all that exists I don't see how someone can derive universal morals while remaining logically consistent.
And what you’re saying is wrong.
Humans are perfectly capable of developing and adhering to morals and values absent a ‘higher source.’
Morals and values are created by man
How do you know they are not innate?
– what’s confusing for so many is that those moral beliefs and values were created behind the façade of religious doctrine and dogma, creating the illusion that morals and values come from a ‘higher source.’
Understanding and acknowledging this fact is perfectly consistent and logical.
If created by man then I would assume they can easily be changed on a whim, and values and rights have no objective worth; so the moral code of Hitler is no "worse" than that of Ghandi.
Your thread premise has failed as a result of a number of logical fallacies and poor reasoning.
Hasty Generalization fallacy: the few are not ‘representative’ of an entire class of persons.
Straw Man fallacy: you contrive the lie that those free from faith “have a strictly materialist view of the world, and typically say that man is no different than an animal,” when in fact nothing could be further from the truth.
Appeal to Ignorance fallacy: that there is no evidence that ‘god’ as perceived by theists doesn’t exist is not ‘evidence’ of its existence.