Of his giving that counsel, and the wickedness of it, (though it proved an oracle beyond his intention), we discoursed before: See Poole on "1 Thessalonians 11:51". The meaning of the high priest was, that right or wrong, whether they had any just accusation against Christ or no, yet they might for expediency put him to death, because his death might prevent mutinies and seditions amongst the people.
Related Commentaries of John 18:14
John 18:14
14 Now Caiaphas was he, which gave counsel to the Jews, that it was expedient that one man should die for the people.