I respectfully disagree.
The new atheism has made its challenge, then. And here is my answer. I don't believe in God, in any meaningful way. I am not a Christian or a Muslim or a Hindu or a Buddhist or a Jew, or whatever else you will. In questions of public policy I feel religion has no place, and rational discourse has to rule. I don't want religious artifacts in the public square, I don't want creationism taught in public schools, and I don't want any religion privileged in any way by government. I am, in most every way that matters, a natural ally of atheism.
But atheism has expelled me. It has expelled me because it has in its heart contempt and loathing and fear of the other. So I reject it. I don't reject all atheists; many atheists are uninterested in ridiculing the religious-- they simply want to be left in peace, and not have religion forced on them or on the law. That, to me, is a principled atheism, and one I am happy to coexist with. But this new atheism, this anti-theism, has only contempt at its heart, and I reject it as thoroughly as it has rejected me.
In a nutshell, when faced with something evil, the proper reaction is revulsion and contempt.
In my opinion, milquetoast atheism (which is happy to let religion perform its daily evils upon us) only holds any validity if you accept as your fundamental premise that religion is ultimately innocuous.
As I have written about on this blog for months now, in my opinion, religion is NOT innocuous. It causes untold amounts of suffering and subjects us to evil acts every day.
As an antitheist, I believe that religion deserves our contempt. If this has the effect of "rejecting" people that are fine with tolerating religion, then so be it.
Update: Dealing with the precise subject matter of the atheist-in-question's remarks, I don't see why he/she thinks they are being rejected from the broader atheist movement.
As noted in this post, an atheist is "Someone who denies the existence of god". Antitheism goes one step further, generally being defined as "Active opposition to the belief in the existence of a God". From this, we can see that antitheism is a smaller subset within the larger construct of atheism.
Based on the above, the broader atheist/non-antitheist movement would be (and likely is) happy to have the writer within its fold. It's the antitheist subset that would not be comfortable with the writer's dangerous religious apologism.