I don't classify my views as religious, although I do classify mine as moral.

Existence doesn't have a purpose. Existence simply "is". Purpose (in general) is the goals of pre-planned actions taken by intelligent agents acting to achieve specific ends through whatever agencies they believe themselves to control.

My answer to what is moral is to undertake actions that work to achieve those ends, as opposed to random junk and hoping for the best. Moral is to think, not accept dogma. For me, that is the exact opposite of religion.

I agree that religion has a place in this debate, but I don't think morality is inherently about religion. I'm not religious, but I do consider myself moral.

I don't know precisely where we get morals from without religion. Clearly it can't be as simple as what the majority prefers: the phrase the tyranny of the majority refers to the problem with that.

We have a deep seated sense of fairness, even without religion. A recent experiment put two monkeys within sight of each other. One did a task and was given a piece of food, then the other did the same task and got a much tastier piece of food. The first does the task again, and again gets the low-value food, but this time he threw it back at the experimenter and beat the bars of the cage, trying to reach the high-value food. That sense seems likely to be where our concept of morality comes from.

I do not deny the (apparent)link between morality and religions but morality, specially non-violence, neither exist/ed only in Christianity, nor it was introduced by Christianity, nor Christianity was/is the largest proponent of it, so what warrants special mention?

Religious arguments or justifications would be laughed out of any ethics class. Regardless of what the other merits of religion may or may not be (not relevant to this discussion), they do not aid these types of discussions.

Any relevant principles can be talked about without a religious carrier signal; including it only serves to alienate those who do not share the same beliefs.

Morality is only inherently religious if your diety is human society. Otherwise religion only impacts morality in the way that its doctrines are passed on by that society.

Person B is not fundamentally immoral, only by the standards of a society and if his moral framework is incompatible with his society then they will leave or be terminated.