Contradiction with Exodus 20:4
This verse commands against making any graven images or idols, whereas Judges 18:4 references a private shrine with an ephod and household gods, which can be seen as contradicting the commandment against idolatry.
Exodus 20:4: Thou shalt not make unto thee any graven image, or any likeness [of any thing] that [is] in heaven above, or that [is] in the earth beneath, or that [is] in the water under the earth:
Contradiction with Deuteronomy 12:8
This verse instructs not to do what is right in one's own eyes, while Judges 18:4 describes actions taken based on personal decisions rather than divine instruction.
Deuteronomy 12:8: Ye shall not do after all [the things] that we do here this day, every man whatsoever [is] right in his own eyes.
Contradiction with Deuteronomy 12:32
This verse emphasizes following God's commands without adding or taking away from them, contrasting with Judges 18:4 where actions are taken outside of God’s explicit instructions.
Deuteronomy 12:32: What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.
Contradiction with Isaiah 42:8
God declares His jealousy for His glory and that He will not share it with idols, whereas Judges 18:4 involves the making and use of idols, conflicting with God's statement.
Isaiah 42:8: I [am] the LORD: that [is] my name: and my glory will I not give to another, neither my praise to graven images.