Wow, Henry...since last I was here some people certainly have become abusive...and guilty of the ad hominem fallacy, I might add. Apparently you've become quite a burr in someone's saddle.
But please consider that when an atheist acts altruistically, she does it in the purity of spirit expecting no reward.
This is the funniest line in the last little while.
If someone is an atheist, there's no such thing as "purity" that they could possibly have, and, of course, no "reward" to follow for having it, so they can't get any points for not looking for one. In their world, there are no punishments or rewards for anything. In fact, nothing is "pure" or "impure": everything simply "is." For them, values are merely the expression of personal choice. So they're complete hypocrites if they indict you for making a choice simply different from the one they have made.
In any case, in their worldview even hypocrisy, if anyone has it, is not a "bad" thing anymore, but simply a choice of lifestyle. As for altruism, some may have it; but they have zero motive for it from their worldview, other than what you say, Henry -- the "feelgoods" they get from their choice to do it. But since "good" is, by their lights, an illusion anyway, what they have left is just "feels."
If you, Henry, "feel" differently, then they haven't got a rational thing to say about that. And that is really chapping their backsides, it's clear, which is why they are reduced to insulting you personally. You've got their backs to a wall.
Nice work, Laddie.