Can a person love a group of people?
Love is an action. It is not a feeling, a hope, a hype, or a case of happenstance.
Love is directing positive regard so that another person understands what he or she is receiving.
I cannot say that I love the human race. "The Human Race" is an abstraction, a set of characteristics lumped together to identify some unreal entity.
I cannot even say "I love you". Words are not enough. How I know that I love is that I show that I love.
I cannot show the human race, the black race, the Asian people, the city of Torrance, Lawndale, London, or Paris, that I love it/them.
Love is an action, a commitment, a charitable connection to a Person.
I can love Him without reserve. Through me, then, He can love the whole world!