In the 1957 film, "Old Yeller," a boy love his dog. But the dog gets rabies (in the process of saving the boy's life, no less). And the boy, still loving the dog, must kill him.
That's how, ideally, we would regard the people in our world who are "carriers" of the destructive force I call "Evil" (and define as "a coherent force that consistently works to make the human world worse"). It's about a SYSTEMIC FORCE, and though it operates through people who serve as "channels" to achieve its destructive impact, it is not about the "evilness" of individual people -- like a Trump, or a Hitler -- who have been made broken by the forces that shaped them.
It's the rabies which is the foe, more fundamentally than those who spread the disease. So as the boy must destroy the dog he loves, when we consider evil-doers we would ideally embody the spirit of "Love Thine Enemies" (even as we protect the world from them). And, ideally, have the compassion to regard a human monster like Donald Trump with the recognition that "there but for the Grace of God [or the operations of chance] go I."
But none of that reduces in the least the need to stop the evil-doers from damaging our world, blocking them, defeating them, sometimes (WW II) destroying them.
As the father (played by Fess Parker) later says to his son, about his having shot to death the dog he loved, "Sometimes a man's gotta do what a man's gotta do."