My argument seemed pretty clear to me. Altruism, which is generally defined as helping others without expectation of benefit, is not at all specific to Christianity, despite that being your impression.
I would be happy to discuss the topic in more detail but your responses have so far consisted of telling me I don’t understand what you’re saying, but without clarifying your position further.
I don't think that altruism is specific to Christianity. I clarified that in a sibling comment (which you seemed to indicate you had read?), and that what I meant was Christianity specifically requires that good deeds must be purely altruistic. It's not considered true charity to do something with the expectation of any kind of reward. Am I wrong in thinking this is distinctly Christian? I'm genuinely interested.