The pastors described in Isaiah 56 seek their own good at the expense of the sheep, they do not possess the knowledge needed to guide the sheep, and they do not do the hard work of warning and protecting the sheep.
A Christmas Devotion from Isaiah—Uzziah, Ahaz, and King Jesus
A Primer on the Old Testament Prophets
Is "Virgin" the Correct Translation of Isaiah 7:14?
The claim that Hitchens and others make is that the Hebrew word behind “virgin” (עַלְמָה alma) in this text simply means “young woman.” The implication is that nothing miraculous is being promised, and that therefore, universal Christian tradition regarding the virgin birth of Christ is based fundamentally on an illegitimate reading of the Old Testament Scripture.