Allah has already told us about the ignorant imitators who are led astray:

And here He tells us about those who call others to misguidance, the leaders of disbelief and innovation:

meaning, with no correct rational thought, and no clear transmitted text; what they say is based only on their opinions and whims.

Allah's saying,

{Bending his neck in pride,} Ibn 'Abbas and others said, "Too proud to follow the truth when he is called to it."

Mujahid, Qatadah and Malik said, narrating from Zayd bin Aslam:

{Bending his neck in pride,} means, twisting his neck, i.e., turning away from the truth to which he is called, bending his neck out of pride and arrogance. This is like the Ayat:

{And in Musa, when We sent him to Fir'awn with a manifest authority. But (Fir'awn) turned away along with his hosts} [51:38-39],

{And when it is said to them: "Come to what Allah has sent down and to the Messenger," you see the hypocrites turn away from you with aversion.} [4:61],

{And when it is said to them: "Come, so that the Messenger of Allah may ask forgiveness from Allah for you," they twist their heads, and you would see them turning away their faces in pride.} [63:5],

And Luqman said to his son:

{And turn not your face away from men with pride} [31:18]

meaning, do not turn away from them in an arrogant manner. And Allah says:

{And when Our verses are recited to him, he turns away in pride} [31:7],

This either refers to those who are stubborn, or it means that the person who does this has been created like this so that he will be one of those who lead others astray from the path of Allah. Then Allah says:

meaning, humiliation and shame, such as when he is too arrogant to heed the signs of Allah, so Allah will send humiliation upon him in this world and will punish him in this world, before he reaches the Hereafter, because this world is all he cares about and all he knows.

means, this will be said to him by way of rebuke.

This is like the Ayah:

{(It will be said:) "Seize him and drag him into the midst of blazing Fire, Then pour over his head the torment of boiling water. Taste you (this)! Verily, you were (pretending to be) the mighty, the generous! Verily, this is that whereof you used to doubt!"} [44:47-50]