John Gill Commentary Psalms 53:4

"Have the workers of iniquity no knowledge, Who eat up my people [as] they eat bread, And call not upon God?" — Psalms 53:4 (ASV)

Have the workers of iniquity no knowledge ?
&c.] In (Psalms 14:4) , it is, "have all the workers". All of them have knowledge, unless given up to judicial blindness, and hardness of heart, to believe a lie, as antichrist and his followers (2 Thessalonians 2:10 2 Thessalonians 2:11); (See Gill on Psalms 14:4);

who eat up my people, [as] they eat bread ;
and drink their blood, and are drunken with it (Revelation 17:6);

they have not called upon God ;
but upon their idols, upon the Virgin Mary, and saints departed. In (Psalms 14:4) , it is, "upon the Lord".