Contradiction with Matthew 5:44
Genesis 26:16 speaks of hostility by requesting Isaac to leave, while Matthew 5:44 teaches to love your enemies and bless them.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Proverbs 24:17
Genesis 26:16 shows a form of rejoicing in getting rid of someone perceived as a threat, whereas Proverbs 24:17 advises against rejoicing when your enemy falls.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
Contradiction with Romans 12:18
Genesis 26:16 represents conflict as Isaac is asked to depart, whereas Romans 12:18 encourages living peaceably with all men.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with Hebrews 13:2
Genesis 26:16 involves asking someone to leave, in contrast, Hebrews 13:2 advises entertaining strangers.
Hebrews 13:2: Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.
Contradiction with Leviticus 19:34
In Genesis 26:16, Isaac is treated as an outsider to be sent away, while Leviticus 19:34 teaches to treat the stranger as one of your own.
Leviticus 19:34: [But] the stranger that dwelleth with you shall be unto you as one born among you, and thou shalt love him as thyself; for ye were strangers in the land of Egypt: I [am] the LORD your God.