Contradiction with 1 Thessalonians 5:3
While Isaiah 66:12 speaks of peace, 1 Thessalonians 5:3 warns of sudden destruction when people claim peace and safety.
1 Thessalonians 5:3: For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.
Contradiction with Matthew 10:34
Isaiah 66:12 speaks of peace, whereas Matthew 10:34 quotes Jesus saying He came not to bring peace but a sword.
Matthew 10:34: Think not that I am come to send peace on earth: I came not to send peace, but a sword.
Contradiction with Jeremiah 6:14
Isaiah 66:12 promises peace like a river, but Jeremiah 6:14 criticizes those who say "Peace, peace," when there is no peace.
Jeremiah 6:14: They have healed also the hurt [of the daughter] of my people slightly, saying, Peace, peace; when [there is] no peace. [hurt: Heb. bruise, or, breach]
Contradiction with Micah 3:5
Isaiah 66:12 proclaims peace, but Micah 3:5 condemns false prophets who lead people astray with assurances of peace.
Micah 3:5: Thus saith the LORD concerning the prophets that make my people err, that bite with their teeth, and cry, Peace; and he that putteth not into their mouths, they even prepare war against him.
Contradiction with Ezekiel 13:10
Isaiah 66:12 promises peace, yet Ezekiel 13:10 speaks against prophets who deceive people with false promises of peace.
Ezekiel 13:10: Because, even because they have seduced my people, saying, Peace; and [there was] no peace; and one built up a wall, and, lo, others daubed it with untempered [morter]: [a wall: or, a slight wall]
Contradiction with Luke 12:51
Isaiah 66:12 announces peace flowing like a river, but Luke 12:51 states that Jesus brings division, not peace.
Luke 12:51: Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division: