It's still a form of love. To those with the emotion of love, acts of rebelling, anger, cursing, fighting, and killing do not work in contradiction to that emotion. Rather, too strong a love could quicken them. What the other wishes is not all there is to love. For those who love another... To disobey, to rage, to curse, to fight, to kill... None of these disproves that love. A love that's too strong may even make those more likely.