Crying with a loud voice. This was either a vain show of zeal, as hypocrites are almost always pricked forward with ambition to break out into immoderate heat; as Caiaphas when he heard Christ say thus, After this ye shall see the Son of man, etc., did rent his clothes in token of indignation, as if it were intolerable blasphemy; or else certainly the preaching of the glory of Christ was unto them such a torment, that they must needs burst through madness. And I am rather of this mind; for Luke saith afterward, that they were carried violently, as those men which have no hold of themselves use to leap out immoderately. [1]

Footnotes

1 - "Subito et intemperanter prosilire," break out suddenly and intemperately.

Then they cried out - That is, probably, "the people," not the members of the council It is evident he was put to death in a popular tumult. They had charged him with blasphemy; and they regarded what he had now said as full proof of it.
And stopped their ears - That they might hear no more blasphemy.
With one accord - In a tumult; unitedly.

They - stopped their ears - As a proof that he had uttered blasphemy, because he said, He saw Jesus standing at the right hand of God. This was a fearful proof against them; for if Jesus was at the right hand of God, then they had murdered an innocent person; and they must infer that God's justice must speedily avenge his death. They were determined not to suffer a man to live any longer who could say he saw the heavens opened and Jesus Christ standing at the right hand of God.

(10) Then they cried out with a loud voice, and stopped their ears, and (a) ran upon him with one accord,
(10) The zeal of hypocrites and superstitious people eventually breaks out into a most open madness.
(a) This was done in a rage and fury, for at that time the Jews could put no man to death by law, as they confessed before Pilate saying that it was no lawful for them to put any man to death, and therefore it is reported by Josephus that Ananus, a Sadducee, slew James the brother of the Lord, and for so doing was accused before Albinus, the president of the country; lib. 20.

Then they cried out with a loud voice,.... These were not the sanhedrim, but the common people; the Ethiopic version reads, "the Jews cried out"; which, they did, in a very clamorous way, either through rage and madness, or in a show of zeal against blasphemy; and cried out, either to God to avenge the blasphemy, or rather to the sanhedrim to pass a sentence on him, or, it may be, to excite one another to rise up at once, and kill him, as they did:
and stopped their ears; with their fingers, pretending they could not bear the blasphemy that was uttered. This was their usual method; hence they say, (o).
"if a man hears anything that is indecent, (or not fit to be heard,) let him put his fingers in his ears hence the whole ear is hard, and the tip of it soft, that when he hears anything that is not becoming, he may bend the tip of the ear within it.''
By either of these ways these men might stop their ears; either by putting in their fingers, or by turning the tip of the ear inward.
And ran upon him with one accord; without any leave of the sanhedrim, or waiting for their determination, in the manner the zealots did; See Gill on Matthew 10:4, John 16:2.
(o) T. Bab. Cetubot, fol. 5. 1. 2.

Then they cried out . . . and ran upon him with one accord--To men of their mould and in their temper, Stephen's last seraphic words could but bring matters to extremities, though that only revealed the diabolical spirit which they breathed.

Cried out with a loud voice. They cried, closed their ears to what they called blasphemy, then, in a tumult, without a vote on his guilt or innocence, rushed upon him to slay him, though yet uncondemned legally.

They rushed upon him - Before any sentence passed.