Does "proselytizing to the needy" mean "proselytizing the poor (to the Christian)"??

Failed to understand the "to" in "proselytizing to the needy".
Why not just have used "proselytizing the needy/the poor"?

Context:


What about all of the good things people have done in the name of God? It is undeniable that many people of faith make heroic sacrifices to relieve the suffering of other human beings. But is it necessary to believe anything on insufficient evidence in order to behave this way? If compassion were really dependent upon religious dogmatism, how could we explain the work of secular doctors in the most war-ravaged regions of the developing world? Many doctors are moved simply to alleviate human suffering, without any thought of God. While there is no doubt that Christian missionaries are also moved by a desire to alleviate suffering, they come to the task encumbered by a dangerous and divisive mythology. Missionaries in the developing world waste a lot of time and money (not to mention the goodwill of non-Christians) proselytizing to the needy; they spread inaccurate information about contraception and sexually transmitted disease, and they withhold accurate information.