Jesus is clearly calling for us to love perfectly rather than behaving perfectly.  Not sinning is simply self preservation.  We are called to more than that.  As hard as it sounds, we are not allowed to hate the Alt Right just as they are not allowed to hate gay marrieds or couples who do not conform to traditional marriage customs.  As Christ calls us to love perfectly (especially the poor), we cannot be a Christian nation without accepting those we disapprove of.  Hating gangsta teens who feel empowered by anti-cop rap video is not allowed, nor is hating the cops who abuse them.