Contradiction with Matthew 5:44
Deuteronomy 25:17 speaks about remembering and acting against Amalek, whereas Matthew 5:44 instructs to love and bless enemies, which contradicts the notion of retaliation.
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 Romans 12:19
Deuteronomy 25:17 calls for remembering an enemy's actions and possibly seeking retribution, while Romans 12:19 advises to leave vengeance to God, promoting forgiveness instead.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.