dogs and pigs

Matthew 7:6 (ESV)

Do not give dogs what is holy, and do not throw your pearls before pigs, lest they trample them underfoot and turn to attack you. 

 I find it to be of great interest that this passage in Matthew, this passage, which is near the end of the Sermon on the Mount, is immediately preceded by the passage that says, "Judge not..." (Mt. 7:1-5). How can one "Not judge" and then be discerning enough to identify "dogs" and "pigs" in order to not present those "holy pearls" to them? 

Is there not a measure of, what one could call "judging"... Is Jesus not referring to people as the "dogs" and the "pigs"?  And then to refrain from presenting words, words that could be called "pearls" or "what is holy", to refrain from presenting these words to people we've deemed to be, well, doglike or piggish in the way they would receive these words: does this not require a level of judgment? 

Do not consider this to be a contradiction in the teachings of Jesus. No. Humble yourself before our Lord and Savior, Jesus Christ. Submit yourself to his teaching and recognize the reality of clarifying words of wisdom. A verse like this does not deny, disrupt, or contradict the previous statement. Instead it gives clearer definition to the previous statement. Like a cleverly crafted lens in a pair of glasses, when placed upon your face, you can suddenly see the leaves on the tree, not just the tree, and you can now see what judging is... and what it is not.