Contradiction with Matthew 10:34
While Isaiah 14:7 speaks of peace and rest, Matthew 10:34 indicates that Jesus 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 14:7 describes rest and peace, while Jeremiah 6:14 criticizes false peace by saying they've healed the wound superficially.
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 Luke 12:51
Contradicts the notion of peace in Isaiah 14:7, as it describes Jesus saying he's come to create division rather than peace.
Luke 12:51: Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division:
Contradiction with 1 Thessalonians 5:3
Talks about sudden destruction coming when people are saying 'peace and safety,' opposing the peace described in Isaiah 14:7.
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 Jeremiah 8:11
Suggests that some declare peace where there is none, contrasting Isaiah 14:7's claim of being at rest and quiet.
Jeremiah 8:11: For they have healed the hurt of the daughter of my people slightly, saying, Peace, peace; when [there is] no peace.