Adam Clarke on Matthew 21:24

I also will ask you one thing - Our Lord was certainly under no obligation to answer their question: he had already given them such proofs of his Divine mission as could not possibly be exceeded, in the miracles which he wrought before their eyes, and before all Judea; and, as they would not credit him on this evidence, it would have been in vain to have expected their acknowledgment of him on any profession he would make.