Behold, all his fellows - All that are joined in making, and in worshipping it, are regarded as the fellows, or the companions (חברין chăbērâyn) of the idol-god (see Hosea 4:17 - ‘Ephraim is joined to idols’). They and the idols constitute one company or fellowship, intimately allied to each other.
Shall be, ashamed - Shall be confounded when they find that their idols cannot aid them.
And the workmen - The allusion to the workmen is to show that what they made could not be worthy of the confidence of people as an object of worship.
They are of men - They are mortal people; they must themselves soon die. It is ridiculous, therefore, for them to attempt to make a god that can defend or save, or that should be adored.
Let them all be gathered together - For purposes of trial, or to urge their claims to the power of making an object that should be adored (see the note at Isaiah 41:1).
Let them stand up - As in a court of justice, to defend their cause (see the note at Isaiah 41:21).
They shall fear - They shall be alarmed when danger comes. They shall find that their idol-gods cannot defend them.