Anyone who practices unconditional love must apply it to everything. It is not possible to love one person or thing unconditionally and love others conditionally (or not at all), just as it is impossible to have an inclusive society that excludes some group of people. Therefore, anyone who loves unconditionally also loves murder, lies, adultery, rape, child molestation, genocide, witchcraft, idolatry, hypocrisy, death, darkness, and evil in general. Conversely, anyone who loves conditionally can choose to hate evil and exclude it from their life.
Anything unconditional is devoid of substance and meaning. Do students learn anything from a class if their teacher accepts any answers? If you are unconditionally guaranteed food, shelter, and luxuries, does hard work or personal growth have any reward? Parents who love their children unconditionally provide just that, and their children are always spoiled brats who have no reverence or humility.
To understand the lunacy of unconditional love, consider its alternative: unconditional hate. Would it make any sense to hate someone no matter how much love and kindness he or she demonstrated toward you? Does it make any more sense to love someone unconditionally who continually murders your family and friends?
Does God love liars, killers, homosexuals, and gluttons unconditionally? No—he condemns them to death or eternal hellfire (depending on your religion). Does the State love criminals unconditionally? No—it imprisons and executes thousands of them. Unconditional love is unbounded, undefined, limitless, and expects no reciprocation. Unconditional love is insanity, and, like an infinite number, no examples of it exist in life.
Why then is unconditional love such a staple of romance novels and philosophical discussions? Doubtlessly, it stems from Romanticism, a period from 1789 to 1850 which emphasized feeling over truth and intuition over reason. A bunch of morons wrote a slew of poems about unconditional, unobtainable love for married or deceased women, and now children and college students of all ages have to waste precious time analyzing and praising the morons and their moronic poems.
People who practice unconditional love, in reality, hate themselves and the human species. They are child murderers, devil-worshipers, back-stabbers, and animal rights activists. True love is conditional.