How to argue against this claim

[Aoi Magi]

Actually, christianity is growing and more people are gaining hope in my God.

And your source for the claim is...?

So your remedy for the poor and downtrodden of the world is not to help feed, clothe and educate them or to tell them they are worthwhile, but tell to tell them to unite and pull themselves up by their bootstraps?

No, those are part of the actions WE can and should take as humans. But unless they also decide to help themselves, all our help will be useless in the end.

Christianity teaches that we are to help the poor and that help comes in many different forms, most importantly, our ultimate reliance on God for everything we have. People are physical and spiritual beings and they need both physical and spiritual things, and that's what we strive to provide.

Those who don't follow christianity are also helping. One doesn't need religion to help another. Also religion on it's own is of no help, without the human intervention.