It's a lot more than a hierarchy of "love God, then perhaps others if you have anything left". Here's the context showing the tight coupling between human love

It's a lot more than a hierarchy of "love God, then perhaps others if you have anything left". Here's the context showing the tight coupling between human love and divine love: We love because he first loved us. Those who say, "I love God," and hate their brothers or sisters, are liars; for those who do not love a brother or sister whom they have seen, cannot love God whom they have not seen. The commandment we have from him is this: those who love God must love their brothers and sisters also.[1] Elsewhere there's the commandment to "love as I loved you", i.e. love others to the point of dying for others. The standard set is incredibly high and hard—hence the Saints, whose lives & sacrifices are commemorated for their selflessness despite other struggles and failings. [1] First letter of John, ch 4