Satans offspring - Connecting the dots basics

Matthew 13
36 Then Jesus sent the multitude away, and went into the house: and his disciples came unto him, saying, Declare unto us the parable of the tares of the field.
37 He answered and said unto them, He that soweth the good seed is the Son of man;
38 The field is the world; the good seed are the children of the kingdom; but the tares are the children of the wicked one;

the wicked one, is satan, and his children, the kenites, were brought into the field (world), when Eve was impregnated by the serpent. The offspring was Cain.

39 The enemy that sowed them is the devil; the harvest is the end of the world; and the reapers are the angels.

The enemy that sowed them is the devil, this is straight forward and to the point.

directed at the Jews at the time of Christ:

John 8
44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.

This post is a super simplified explanation of who the jews really were at the time that Christ walked the earth. For a more in depth understanding of this, a study of John chapter 8, along with Galations chapter 3, is a must. Connecting these basic things together is essential to understanding this topic in more depth.