We do not impose moral judgments on people who care for their own children, parents, or siblings than they would for other people even though in the cosmic sense no life is worth more than any other. Even regarding giving charity, Rambam in Matanot Evyonim 7:13 (based on B. Bava Metzia 31b) writes that one’s family takes precedence for charity over the people of his city which take precedence over those outside. The issue is not of holistic moral worthiness, but the proximity of the relationship places additional requirements, obligations, and affinities such that it is not only moral but expected to prioritize the needs of some over others.

Rabbi Josh Yuter, e-mail message, 4 December 2012.