What is the meaning of John 9:28?

Then they reviled him, and said, Thou art his disciple; but we are Moses’ disciples. (John 9:28 KJV)

And they reviled him, and said, Thou art his disciple; but we are disciples of Moses. (John 9:28 ASV)

They railed at him, and said, Thou art his disciple, but we are disciples of Moses. (John 9:28 DBY)

They insulted him and said, “You are his disciple, but we are disciples of Moses. (John 9:28 WEB)

They reviled him, therefore, and said, `Thou art his disciple, and we are Moses’ disciples; (John 9:28 YLT)

Interlinear

Then <oun> they reviled <loidoreo> him, <autos> and <kai> said, <epo> Thou <su> art <ei> his <ekeinos> disciple; <mathetes> but <de> we <hemeis> are <esmen> Moses <Moseus>’ disciples. <mathetes> (John 9:28 KJV)

Albert Barnes’ Commentary

Verse 28.  Thou art his disciple. This they cast at him as a reproach. His defence of Jesus they regarded as proof that he was his follower, and this they now attempted to show was inconsistent with being a friend of Moses and his law.  Moses had given the law respecting tho Sabbath; Jesus had healed a man contrary, in their view, to the law of Moses.  They therefore held Jesus to be a violater and contemner of the law of Moses, and of course that his followers were also.  

We are Moses’ disciples. We acknowledge the authority of the law of Moses, which they alleged Jesus has broken by healing on that day.  

{o} “reviled” 1Pe 2:23