Contradiction with Numbers 21:24
Numbers 21:23 shows Israel attempting diplomacy before conflict, while 21:24 shows immediate actions of violence.
Numbers 21:24: And Israel smote him with the edge of the sword, and possessed his land from Arnon unto Jabbok, even unto the children of Ammon: for the border of the children of Ammon [was] strong.
Contradiction with Deuteronomy 2:29-30
This passage mentions that other nations allowed Israel safe passage, unlike how the Amorites responded in Numbers 21:23.
Deuteronomy 2:29-30: (As the children of Esau which dwell in Seir, and the Moabites which dwell in Ar, did unto me;) until I shall pass over Jordan into the land which the LORD our God giveth us.
Contradiction with Joshua 11:19
Highlights a nation's willingness to make peace with Israel in contrast to the Amorites in Numbers 21:23.
Joshua 11:19: There was not a city that made peace with the children of Israel, save the Hivites the inhabitants of Gibeon: all [other] they took in battle.
Contradiction with Matthew 5:9
Jesus blesses the peacemakers, contrasting with the hostilities initiated in Numbers 21:23.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.