Contradiction with Exodus 20:5
It states that God visits the iniquity of the fathers upon the children, which contradicts the idea that the Rechabites are praised for obeying their father's command over generations.
Exodus 20:5: Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God [am] a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth [generation] of them that hate me;
Contradiction with Ezekiel 18:20
It clearly states that the son shall not bear the iniquity of the father, contradicting the notion of generational obedience seen in Jeremiah 35:12.
Ezekiel 18:20: The soul that sinneth, it shall die. The son shall not bear the iniquity of the father, neither shall the father bear the iniquity of the son: the righteousness of the righteous shall be upon him, and the wickedness of the wicked shall be upon him.
Contradiction with Matthew 23:9
This verse instructs not to call anyone on earth "father," which contradicts the idea of the Rechabites obeying their earthly father's traditions as seen in Jeremiah 35:12.
Matthew 23:9: And call no [man] your father upon the earth: for one is your Father, which is in heaven.