In the “Discourses of Brigham Young,” page 272 it says the following:
Do I say, Love your enemies? Yes, upon certain principles. But you are not required to love their wickedness; you are only required to love them so far as concerns a desire and effort to turn them from their evil ways, that they may be saved through obedience to the Gospel (DBY, 272).
HERE is the source and some more quotations from the prophet to consider.