Albert Barnes on Acts 27:42

And the soldiers' counsel, etc. Why they gave this advice is not known. It was probably, however, because the Roman military discipline was very strict, and if they escaped, it would probably be charged on them that it had been done by the negligence and unfaithfulness of the soldiers. They therefore proposed, in a most cruel and bloodthirsty manner, to kill them, though contrary to all humanity, justice, and laws; presuming probably that it would be supposed that they had perished in the wreck. This is a remarkable proof that men can be cruel even when experiencing the tender mercy of God; and that the most affecting scenes of Divine goodness will not mitigate the natural ferocity and cruelty of those who delight in blood.

(d) "counsel" Ps 74:20