At its core atheism IS a religion.
Just because you redefine what the word "religion" applies too doesn't mean that it is therefore the truth, you get get to define reality as it applies to persons other than yourself.
It takes faith to take insufficient evidence and jump to the conclusion that there is no God
Atheism isn't a belief that there is no god, it's the lack of a belief in a god or gods, an atheist has no position on the matter. In your ignorance you have confused atheism with anti-theism, they are not one in the same, no matter how much you claim that they are. Atheism doesn't jump to a conclusion at all it simply doesn't acknowledge the question as a valid one.
All our arguments mean nothing to the atheist,
Because at their very core your arguments are flawed. You have jumped to the conclusion that there is a "god" without sufficent actual evidence, you believe it because that's what you want to be true, not because you have been presented with irrefutable evidence because such evidence would by it's very nature be convincing to others without have to engage in special pleading or other logical fallacies which lie at the heart of all your arguements.
not because of any validity or lack thereof: but because we are the heretics in the religion of atheism
To be engaged in heresy you would have to be practicing a brand of atheism that is contrary to accepted dogma and tenets, atheism has neither dogma nor tenets.
Atheism cannot support its philosophy with logic,
Atheism isn't a philosophy, it's simply an answer to the question "Do you believe in a god or gods". Atheism has no tenets, dogma, or worldview and no amount of sticking your figers in your ears an yelling "LALALA I can't hear you" is going to change that.
so they must ignore/fabricate faults with all arguments to the contrary.
Atheists have no need to fabricate faults in your arguments, you have a plethora of them to begin with.
Pride is the sin that is killing the atheist.
Sin is a concept of your own making, not an inherent part of existance.
Admitting he may be wrong is a violation of his religion.
On the contrary, i fully admit I very well could be wrong, but I have no reason to think that you are right. I'm not so arrogant to think that I have all the answers and that I can therefore dismiss all others as deluded and incorrect. If shown irrefutable evidence that a god, any god, does in fact exist then I am perfectly willingly to change my veiws on the matter.
There are hundreds if not thousands of different religions out there, each claiming exclusivity for their deity of choice, they can't all be worshiping the one and only true god, they can't all be right, but they can all be wrong, and I have chosen not to make claims about reality or the exclusivity of religion that i cannt personally back up.
when he considers himself mentally superior to mindless followers of faith.
Not every atheist consider themself mentally superior to theists, and the fact that you claim that they do is just your persecution complex showing through. You want to believe they all think that so you can feel justified. After all, How dare these people not believe exactly what you tell them to, how dare they have their own opinions or make up their own minds, don't these people know that christians alone have a monopoly on truth.
That's why arguments with an atheist always go in a circle.
I don't want to hear about circular arguments from the people who brought us the "The Bible is true because the bible says it's true" argument.
An atheist is the most close minded person you will ever meet.
How so? Just because i don't believe what you say I should? That's not closed minded, Rejecting the slightest possibility that you may not have all the answers is closed minded. Theres alot of things I don't know, but al least I'm wiling to learn rather than rejecting them out of hand because they don't agree with a particular choice of theology.