The Authorship of Isaiah

Actaully, there is more than just that. There is also1) Theme.
2) Writing style
3) Vocabulary.The evidence is clear. Only the most reactionary people whose mind set disagree.

Actually, when it comes to the critisim about Isaiah, Jews and Christians populate it. The scholars who populate the debate tend to be theists. I would hardly characterize the people who wrote the 'Harper's bible commentary" , or the "Introduction to the Old Testament" as atheists.Attacking higher critisism by saying most of them are atheists is a strawman. Unless you have someone whose religious beliefs interfers with their conclusions, such as Gene Scott, a persons religious and
political beliefs have little to do with their scholarly conclusions.