Charles Spurgeon Commentary John 9:28

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

Then they reviled him,

It is a bad case, so abuse the plaintiff. There is nothing to be said for our side, so let us abuse the man who has had his eyes opened.

Then they reviled him,—

That is an unprincipled lawyer's rule—when you cannot answer the plaintiff's argument, abuse him. This was the last resort of those who knew that they had a bad case, or no case at all: Then they reviled him,—