Most Atheists on here are former Christians who find the concept of God in the NT bizarre.
I find the concept somewhat bizarre, although I have gone through different stages of belief and non-belief during my life. I've found that a lot of people make assumptions about atheists and agnostics which don't really fit my own experience. I was initially baptized Catholic, but my early childhood was marked by abuse, manipulation, deception, and indoctrination - by parents and grandparents who supposedly "believed," yet did not even follow the commandments and principles of their own beliefs.
My father was raised in a Protestant denomination, but converted to Catholicism when he married my mother. I never understood why he did that, since most of his own family was anti-Catholic. Although I didn't start to question it until later in life. When my parents got divorced, my mother slowly drifted away from the Church and eventually converted to Hinduism. My father also left the Church and joined a Methodist church, which was the church of his new wife (my step-monster).
After I reached adulthood and was attending college, I was also working part-time at a hotel, where one of my co-workers was Muslim, and we had some rather long talks about religion. He was a Mexican-American who was also raised Catholic, but had converted to Islam some 20 years earlier. One of my classmates in high school (although I never really knew him, as he ran with a different crowd) was the son of a local Muslim cleric who had introduced a new translation of the Quran which other Muslims considered "heretical." He claimed to have discovered the mathematical code for the Quran, and he produced a series of videos which were cablecast over the local public access channel (before the days of the internet and YouTube). I'll admit that he almost had me convinced. He claimed that he had discovered God's true message and that the vast majority of Muslims were all wrong. I recall in one of his videos he even said that most Muslims were "in Satan's camp."
Of course, he had numerous death threats hanging over his head, and one morning he was found stabbed to death in his own mosque.
At that time, I had been volunteering at the local public access TV station - and there were quite a few religious people who had their own shows to "spread the word." I met two people who claimed to be the Messiah. One of them was a real fire-and-brimstone type, whose main shtick was in calling out Christians whom he felt were hypocrites. He felt that anyone who pays taxes to the government would be held just as guilty for the government's crimes. He was also in a running feud with a few of the Christian preachers in town, although many Christians were so offended by his rhetoric that he experienced death threats, a great deal of harassment, and even violent attacks - which he offered as "proof" that Christianity was hypocritical and false.
I have to admit I did somewhat admire the guy, even if he was a bit "off," so to speak. Even the local atheists liked him, since he was riling up some of the more obnoxious Christians around town. When speaking to him one to one, he came across as rather intelligent and knowledgeable about the Scriptures. I never actually believed that he was the Messiah, but I was convinced at that point that most or all established religions were probably false. Seeing how they react against the dissenters among them was what did it.
It seems to me that true believers would not be afraid of dissent or disagreement. True believers would not be offended by any perceived insult to their beliefs or anything they regard as "heresy."