If I had not come and spoken unto them, they had not had sin: but now they have no cloke for their sin.
Those who opposed Christ had seen Him and heard His words. Though they could find no fault in Him whatsoever, they still rejected Him. Their rejection of Christ was what made their sin so great. Compared to , their other sins were as nothing. They had no excuse for their sin because they had rejected the One who was sent to forgive them.