Let's just say that what are being derogatorily referred to as 'swine' are those who are offensive in some way, 'the infidel' in Islam; 'sinners', in Christian terms, etc. The point of any religion is to try to stir the conscience of these people so they might see the errors of their ways so a change might come about. But to label them in this manner only drives them further away, as derision only stirs up their resentment and anger. This is not the way of spiritual people. All spiritual teachings recognize that hatred cannot be confronted with more hatred, contempt, or condemnation, because that approach only achieves the opposite of the intended goal. Yeshu, in some of his last words, asked that his transgressors be forgiven not for their sin, but for their ignorance. And in the minds of his transgressors, they firmly believed they were doing the correct thing in their moral system. Nazis believed in their doctrine of racial purity and acted upon it, as misguided as it was. In the US, many Christians dream of establishing an official 'Christian Nation', not understanding that this would then promote the nurturing of a non-Christian scapegoat worthy of righteous ostracization and persecution, and even death. Currently, Buddhist monks in Miranmar slaughter Muslim men, women and children as retribution for the rape and murder of a Buddhist nun. Everywhere we look, we see the projection of Shadow onto some scapegoat in the vicious ego game of one-upmanship as a means of fortifying the Persona. This has become the scourge of mankind, with the hatred spreading like wildfire throughout the world, even, or perhaps especially, amongst those who claim to be acting in the name (or guise) of spiritual and/or religious 'authority'. The ultimate punishment of the 'wicked' has come via flood, famine, disease, and even via The Avenging Angel of Death. We await the image of Jesus, the Conquering General who will vanquish the wicked in some near future, and establish his 'kingdom on Earth', Ultimately, the final image will be of the righteous in Heaven, peering over the battlements to the wicked writhing in agony down below, exclaiming and taking comfort in the fact that they are getting every bit of what they deserve, in the old and ignorant Eye for an Eye philosophy. We are caught in a vicious circle of never-ending righteous punishment and retribution which ultimately does not work, as the emergence first of Al Queada, and then of ISIS and Boco Haram, and prisons filled to the brim are testament to. And, oh yes, let us not forget the horrifyingly brutal 400 year long Inquisition, all done in the name of Good, and Light, and Right.
Essentially, much of what has been attributed to Jesus are words put into his mouth by others. A truly spiritual being would not have uttered the quote in question. Only here and there do we find tidbits of the mystical words of Yeshua in the Bible which survived the destruction of his original teachings that were overwritten with the pagan teachings of Mithra, replacing a doctrine of the breath as the life-force with that of blood as the life-force, where blood sacrifice took precedence plunging man back into ignorance, guilt, and fear, and keeping him there as a means of controlling the human spirit. The 'debt' that man owes to God for his disobedience and the murder of his son can never really be repaid. Either one remains underfoot as the unforgiven, or joins in with the ranks of the righteous moral authority which metes out punishment and control, and which reaps the benefits by making the 'unforgiven' and 'unworthy' pay up. None of these scenarios have anything to do with the authentic spiritual experience. They are all ego-driven. practices.
Christianity: "Forgive them, for they know not what they do"
Taoism: "Requite hatred with virtue"
Hinduism: "Do only good to those who do evil against you"
Buddhism: "“Hatred does not cease through hatred at any time. Hatred ceases through love. This is an unalterable law.”
The Chinese Point of View:
When one formulates a concept of The Good, one has simultaneously also created a concept of Evil. In creating a concept of Evil, one must now oppose Evil, as dictated by The Good. In opposing Evil, one only makes Evil stronger. Therefore, the sage never tries to do moral Good.