“Let these words sink into your ears, for the Son of man shall be delivered up into the hands of men.”
Note the stress Jesus places on what He says. “Let these words sink into your ears.” He could not have been more emphatic. And what was the message? “The Son of man shall be delivered up into the hands of men.”
The emphasis is interesting in view of His recent Transfiguration. What shame it brings on the world by implication. The glorious Son of man, God's beloved Son, is to be delivered by God into the hands of sinful, debased men. And what they will then do is assumed. Man is not seen as trustworthy, especially when dealing with pure goodness.
Strictly speaking, of course, a son of man being delivered into the hands of the sons of men should not have been ominous. Should they not treat well their own? What makes the difference is that He is ‘the Son of Man', the Righteous One representing ‘the holy ones of the Most High', and the assumption is made that His righteousness will therefore bring out the worst in men.