First, the disclaimer. Obviously an internet article cannot be long enough to give a fullscale explanation of the "New Atheist" perspective, but it's good enough to get a debate rolling. If anyone's interested in the subject, I highly recommend reading at least 3 books (Dawkins: The God Delusion, Hitchens: God in Not Great, Harris: The End of Faith), as they are provocative, yet very well argued. I also find it amazing and amusing that all three essentially come to similar conclusions even though they approach the questions from a different angle (Dawkins the scientist, Hitchens the public writer/journalist, Harris the philosopher).
I don't understand why all "religions" and I use that term lightly, are grouped together in a singular entity. They are vastly different and can in no way be quantified together in any meaningful way. Some have commonalities and a few are very closely similar but there are so many disparate theologies that you simply can't group them all together like they are attempting.
While the theologies are indeed different, at the core all religions share the same nasty foundation: They claim to hold the key to the TRUTH. They claim that if you accept their explanations, you will have the answers to all the questions worth asking and more. They do not try to convince you of course, they ask for your FAITH, in other words to take their claims at face value, without questioning, asking for evidence or second-guessing. Of course, since their truth is absolute, by this definition everyone else who thinks differently (even just a little) is wrong.
A gummy bears come in many colors, but at the end of the day, they are all gummy bears. You MIGHT argue that Buddhism is somewhat different, but it has its own dogmas too.
Plus the article doesn't even try to hide its prejudice as it openly attacks people by claiming those who believe are delusional. That's not even an argument its just an opinion of the writer. If someone wants to make an argumentative piece with facts to back them up that's one thing but personally attacking people while at the same time claiming they "possess a stronger or more ethical sense of social justice than their religious peers" isn't exactly helping their cause :/
If I were to believe that cats are actually infiltartion units of a malicious galactic civilization that will rise up once they receive the command to do so by their overlords, you would be right to ask what evidence I have to support this theory. If I have none, yet continue to firmly believe my being right, you would be right to call me delusional. This should not change if I have a million peers ascribing to my beliefs. Why do people call flat earth theorists delusional, and Christians not? They have exactly the same amount of evidence to back their "Truth".
As for the moral question, the author is referencing an actual, scientific study: https://secularpolicyinstitute.net/wp-content/uploads/2014/12/Zuckerman_on_Atheism.pdf Is this this 100% conclusive? Of course not, nobody claims that. But it's something to base an argument on.
The statement that, "Religion may become extinct in nine nations" is something of a stretch. First off the sample size is far too small and there haven't been enough concurrent similar social studies to either prove nor disprove this claim. I might concede to the statement that less people are finding a religious affiliation but death of religion is really reaching.
Bit of a stretch, true. Even if there are some observable trends in this direction. But it is amusing how you immediately turned to scientific reasoning ("sample size is far too small", "haven't been enough concurrent similar social studies") when it illustrates your point while conveniently ignoring it at the previous point 
Also blaming racism and cultural tolerance on religion? What religion are you talking about because there are a lot of different ones, stop trying to stereotype millions of people. Racism and intolerance isn't unique to any group, its brought on mainly by ignorance and fear. People fear what they don't understand and this leads to resistance and rejection. Education and the sharing of knowledge is what brings people together while fear and ignorance divides. Don't use religion as your scapegoat for why racism exists.
While religion isn't the root of all evil, I think we can assert with confidence that it does NOT help in the grand scale of things. We can harken back to the paragraph about being the beholders of the TRUTH versus all the other infidels who are WRONG. Black VS White. Few ideals advocate an In-group VS Out-group mentality more than religions. This is especially troubling because:
Most religions preach acceptance and the spreading of the word to ALL NATIONS AND PEOPLE.
This is FACTUALLY wrong, the worst offenders being the Abrahamic religions. Just read the holy texts. Sure you can cherry pick the parts you "like"...but then you're kind of bending over backwards to get the narrative you want, aren't you? Why not just take out the principles you think to be good and valuable and dump the rest?.
That whole article is an attack on millions of people brought forth by the writers fear of what he doesn't understand. He labels all "religious individuals" together and assumes they are all the same person. The whole thing made me feel like he has some personal hate for me for something other people have and even stuff others haven't even done yet. He keeps talking about a coming apocalypse and terrorism. Frankly he sounds just like the bigoted, racist, fearful of what they don't know or understand "religious people" he was attacking throughout this whole article.
I started reading this because I truly was interested in the point of view and wanted to expand my knowledge on what the Atheist Movement was about and all I got was the ramblings of a fearful man attacking millions of people for things they haven't even done O.o
And then this is your opinion. Is the article provocative? Yes, I suppose that's what the writer was going for.