 One way to understand Asaṅga’s view here would be to imagine that one of your loved ones, such as your brother or son, is slipped a drug which makes him temporarily insane, and he then attacks you with a knife. To remain passive and let him kill you would not be the best thing you could do for him. If you are able to knock him down, take the knife away and restrain him, you thereby protect him from a lifetime of regret and distress resulting from having killed you. This use of coercive force would therefore naturally flow from your love for him.