imo, Jesus was not much difference when comparing today's atheists.
I can see that he and his followers mainly believed in the natural GOD, from the Stoicism perspective.
A God consists all things and everything in the (multi)universe. All human beings including Jesus is part of the GOD!
A GOD encompasses/incorporates various forms of Gods that were worshiped by various religions from various cultures.
That has been a truly simple concept/perception/instinct from the mind of all human beings! Without requiring any reading, studying, intelligence, etc. to capture this GOD feeling and recognition!
An atheist does not believe any conventional religious God concept due to various reasons and rejecting all the attributes of God from all religious, basically.
However, when considering a GOD concept being a scientific approach one based on evidence/logic/rationality, then the rejection by atheists would become invalid! As at the same time, an atheist becomes a fervent believer and fundamentalist of "No God"! That would be no difference between other believers of religions!
One of his
'interesting' parable was like that, believers (elder son) are not truly believers, while non-believers are actually believers (younger son)!
Of course, the scientists are basically believers of sciences, dynamically based on their research approaches and theories. Rather than a fixed set of outdated books, that were based on verbal stories from their old, very old, antecedents - without any proven evidence! Simple because the uneducated majority trust their leaders who were often a bit of better intelligence and education, especially religiously.
Jesus set an example to today's atheists, as well as the secular world! In an analytical and logical/rational sense! (He was a rational thinker! On Sundays, people can do anything just like on everyday!) Obviously he also wished/wanted the religious believers to do the same, especially his followers/students!
(Think about what some believers (front runners) today would think and talk about non-believers (rear walkers)!)
Jesus was a visionary marketer/promoter/pioneer of equality (everyone is a son of God. Not just believers!) and liberty (salvation) for every individuals, no matter believers or non-believers of any religions! He said, Rains are for All! Not only for just a few (good men)!
A God concept Jesus himself believed has no physical form, no boundaries/limitations, for all human beings - poor by suppression/ sicked by birth/ sinned by morality standards, etc.
Several of Jesus' parables repeatedly implied the above meaning and reality! Spiritually and physically speaking!
As he also specifically mentioned probably only few/some would understand the actual/implied (deeper) meaning of his parables (eternity? heaven?)!
Just another 2 cents!
http://www.elitetrader.com/et/index.php?threads/atheism.300055/page-19#post-4295849