It's amazing that Christ had the audacity to compare people to wild dogs and pigs; however, that is exactly what he did. Not only that, he instructed his disciples to do the same. In this world that cries "JUDGE NOT", Christ reminded his disciples that there are times, people will not appreciate that which is sacred and we have to discern who is ready to hear the word of God. It's a tough truth to swallow, at times, but it is necessary.