I do, in a sense - I entirely question their sincerity and objectivity.
Of course you do. You've been trained to. According to your holy scriptures, unbelievers are corrupt, vile, wicked, abominable, godless vessels of darkness in the service of evil, not one of whom does any good, to be shunned, and all of whom are fit to be burned alive forever as enemies of a good god and the moral equivalent of murderers and whoremongers. Is it any wonder people that read those words or hear sermons from others that do are filled with hatred for atheists?
[1] "The fool says in his heart, 'There is no God.' They are corrupt, their deeds are vile; there is no one who does good" - Psalm 14:1
[2] "But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, all liars, shall have their part in the lake which burneth with fire and brimstone." - Revelation 21:8
[3]"Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?"- 2 Corinthians 6:14
[4] Who is the liar? It is the man who denies that Jesus is the Christ." - 1 John 2:22
[5] "Whoever is not with me is against me" - Luke 11:23
You simply weren't able to defend yourself from your religion's bigotry, and so here you are on the Internet telling everybody who will listen what failed people atheists are. Of course, you only reveal the ethical shortcomings of your religion.
can anyone of you explain the gratuitous and unfathomable atrocities in the world?
Yes, but you can't.
not one of you god-haters have even remotely understood a thing being said here.
You flatter yourself, atheist-hater. Nothing that you say isn't simple.
You come back with idiotic replies about comparing the landslide majority of people who have ever lived on the planet having worshipped something, with that of the belief in Santa Claus.
What's the difference except the particulars of the beliefs? Santa's jolly and Jehovah is angry. Santa gives coals to bad kids and Jehovah sends bad kids to hell. Then there's the overlap. Each keeps a naughty and nice list, and their is no evidence that either ever existed. Believers are routinely offended whenever their god is compared to any other fictional character, but that's your cross to bear.
Where in the world did 90% of the human inhabitants on this earth acquire such a propensity, how did protoplasm and stardust endow man with such a spiritual dimension to his constitution?
A propensity for religion? Biological evolution combined with cultural evolution.
Billions of dollars spent on religious edifices, religious education, literature, debates, degrees, sermons,. missionary efforts, martyrdoms, asceticism, dissertations on virtue and morality
Man is adept at exploiting his fellow man. That's what the priesthood is all about. Religion is big business now, although it seems to be meeting the fate of Blockbuster Video as churches close left and right for lack of relevance. Being a priest has always meant not having to work outdoors or labor. No special talent is needed except the gift of gab. There are no qualifications. And people will take a day off from work each week and bring you money if you tell them to.
Are you so naïve that you can't tell the difference between a charlatan, and a devout believer?
The question always arises with outrageous claims whether the claimant actually believe them himself, but why should one care? I steer clear in either case.