Loving your children can be one of your chosen "ends."
What is abhorrent is when the government choses your ends, for you.
We should not want that.
We should not want government-forced sacrifice instead of giving an inheritance to a beloved person according to our own choices.
I would argue that people who want to ban inheritance love their "brothers" (random and probably non-deserving strangers) too much, and love their children too little.