People can agree and hate each other. Both Taiwan and China agree that there is one government for the Chinese people. Two people can both in love with the same person, and an both believe that the person is amazing and should be dating exclusively. I have gotten into a few spates with my wife about how to raise our children and we both agree that we love our children and want the best. I had a roommate once where we both agreed the dishes should be done every night by one of us.