Wtaf. Who the hell mocks a child for caring about their parent.

Like oh no, this boy has someone to love ! Better mock him since I personally have... No one to love ?

Is that the reasoning

Edit to add some ranting

I think its some primal urge to not show you care about something to the other apes because thats the first thing rivals will violate and destroy....so maybe it served a prosocial purpose back when inter-group interactions between humans were a greater and more unpredictable risk. This is also a similar explanation for why racism likely developed.

Atavistic instincts originally meant to increase our odds of survival as animals that no longer serve any purpose in civilized society....but such civility requires at least rudimentary self-awareness, empathy and discipline....which sadly is not part of how males are typically socialized.

This is just my take anyways