Martin Luther didn't respect the authority of the Church and refused to practice some of the Sacraments.
He was a HUMANIST that re-created a church in his own image to be exact.
Later a King created another branch of Christian faith when he wanted to live in an adulterous relationship and the Pope refused to grant a divorce.
In this case, it is a better reason to split and reform.
Martin had great respect for the authority of the chruch.
He had little respect for the leaders. (sound familiar?)
He did not want to destroy the church or create a new one, just reform it.
From
http://www.iclnet.org/pub/resources/text/wittenberg/concord/web/smc-pope.html "The Roman Pontiff claims for himself [in the first place] that by divine right he is [supreme] above all bishops and pastors [in all Christendom].
Secondly, he adds also that by divine right he has both swords, i.e., the authority also of bestowing kingdoms [enthroning and deposing kings, regulating secular dominions etc.].
And thirdly, he says that to believe this is necessary for salvation. And for these reasons the Roman bishop calls himself [and boasts that he is] the vicar of Christ on earth.
These three articles we hold to be false, godless, tyrannical, and [quite] pernicious to the Church."