What did Christ mean by "casting one's pearls before swine?" Mathew 7:6?

there is no person named "Christ." As for the euphemism, often used in literature and apologetics, homiletics, ad naseum, people with wisdom should not waste their time giving advice to fools. Belief in alleged deities is foolish. Accordingly, most Atheists do not cast our pearls, our precious time and advice "before" pigs who greedily eat up more platitudes and irrational swill from other believers, con - artists and religious hucksters. Above all I do not "vote" for theocrats who cheat us all out of tax money for corrupt violent religious businesses and evil activities of the Congressional C Street Cult of Senator Ensign, Senator Grley and Governor Sanford.