Contradiction with Matthew 10:34
Jesus states He came not to send peace but a sword, which contradicts the blessing on peacemakers.
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 Luke 12:51
Jesus mentions He came to cause division rather than peace, opposing the call for peacemakers.
Luke 12:51: Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division:
Contradiction with Exodus 15:3
Describes the Lord as a man of war, contrasting with the peacefulness advocated in Matthew 5:9.
Exodus 15:3: The LORD [is] a man of war: the LORD [is] his name.
Contradiction with Joel 3:9-10
Calls for preparing for war and beating plowshares into swords, which goes against promoting peace.
Joel 3:9-10: Proclaim ye this among the Gentiles; Prepare war, wake up the mighty men, let all the men of war draw near; let them come up: [Prepare: Heb. Sanctify]
Paradox #1
The contradiction or conflict could be that while encouraging peace, other parts of the text sometimes depict or endorse war, conflict, or divine punishment. This might seem inconsistent with the message of promoting peace and being peacemakers.