“Do not give dogs what is sacred; do not throw your pearls to pigs. If you do, they may trample them under their feet, and turn and tear you to pieces.”
He expressed disagreement with the common interpretation that the verse means you should not waste time with people who are rejecting your Gospel of the kingdom. He says, no, you don't leave them alone, because they are the ones you exactly are reaching out to. Thus, if you believe this commonly believed meaning, you may actually be doing it wrong.
