Contradiction with Genesis 11:7
This verse discusses confusion and scattering, which contradicts the organized gathering of men by Joshua to accomplish a clear task.
Genesis 11:7: Go to, let us go down, and there confound their language, that they may not understand one another's speech.
Contradiction with 1 Corinthians 14:33
God is described as not being the author of confusion, contrasting with any possible notion of chaotic assembly, unlike the orderly direction given by Joshua.
1 Corinthians 14:33: For God is not [the author] of confusion, but of peace, as in all churches of the saints. [confusion: Gr. tumult, or, unquietness]
Contradiction with John 8:59
Jesus hides and escapes, showing an act of avoidance, which contrasts with the decisive and public act of Joshua calling the twelve men.
John 8:59: Then took they up stones to cast at him: but Jesus hid himself, and went out of the temple, going through the midst of them, and so passed by.