"Antipathy, dissimilarity of views, hate, contempt, can accompany true love"

Marshall McLuhan is recommending that sensations such as antipathy, significant difference of views, hate, and contempt can exist together with real love. Simply put, even if 2 people like each other, it doesn't indicate that they agree on everything or like every element of each other's personality. These unfavorable emotions can exist side-by-side with love and do not necessarily negate it.