The first step to loving people is to think of them, of everyone, as your complements, first and foremost in the worldwide division of labor:
We may call consciousness of kind, sense of community, or sense of belonging together the acknowledgment of the fact that:
all other human beings are potential collaborators in the struggle for survival, because they are capable of recognizing the mutual benefits of cooperation, while the animals lack this faculty.
However, we must not forget that the primary facts that bring about such consciousness or such a sense are the two mentioned above.
In a hypothetical world in which the division of labor would not increase productivity, there would not be any society. There would not be any sentiments of benevolence and good will. (Mises, HA, 144)
The greater productivity of work under the division of labor is a unifying influence.
It leads men to regard each other as comrades in a joint struggle for welfare, rather than as competitors in a struggle for existence.
It makes friends out of enemies, peace out of war, society out of individuals. (Socialism, 261)
Again, this strengthens the merely natural sentiment. Christian charity goes far beyond it, but it requires nature and crumbles into dust if nature is compromised.