But when they knew that he was a Jew
And so equally an enemy to their idolatry, as Paul and his companions were, whether he was a Christian or not.
All with one voice about the space of two hours cried out;
all that were in the theatre lift up their voices at once to prevent Alexander's apology, or at least its being heard; and which they continued about two hours, which was a long time to keep hallooing out,
great is Diana of the Ephesians; (See Gill on Acts 19:28).