Simply put, because kissing is different, there is a difference between people you are close to and strangers, so we are close to those who are close to us and alienate us.
Benevolence in Confucianism refers to people who are close to themselves (not especially relatives, but also like-minded people).
There is a level difference of love. "I love my country more than other countries; I love my hometown more than other places; I love my neighbor more than my hometown; I love my family more than my neighbors. "
In fact, human nature is selfish, and Confucianism is closer to reality, so it is more easily accepted by the world and eventually becomes the backbone of traditional culture, while Mohism is too idealistic and can only dissipate.