A relationship just can't thrive only on love. It has to have three key components i.e love, respect, and trust. No matter how much you love someone the other two are equally important. If your bf uses the threat of breakup to stop you from putting your views in a fight it means he doesn't respect you enough to let you put your views. He can't be right all the time. According to me, you should have a talk with normally and if he threatens again just buck up a breakup. You deserve better.