In The Crucible, how does Danforth's adherence and obstinateness of the laws of Salem ultimately lead to the thoecracy's failure?

To me, Danforth's actions help lead to the end of the
theocracy because they show how unthinking and unbending that theocracy is.  This shows
up particularly clearly in Act IV when Danforth will not give in and grant reprieves to
people like John Proctor and Rebecca Nurse.

By Act IV, the
people of Salem are getting to be a bit unhappy with the court.  And Parris and Hale and
others like them are worried that this will get worse if respected people like Proctor
and Nurse are executed.  But Danforth will not give in.  He is adamant that the
executions must go ahead unless the two confess.  By pushing ahead simply because he
wants to maintain his own power and influence, Danforth makes people even more unhappy
with the theocracy.