"The Causes of the English Reformation. Henry VIII's break with Rome was an act of state, promptly primarily by political motives, but many of those who supported Henry were appalled at the abuses rife in the Catholic Church and at the corruption of the Papacy."
An indulgence was a document given by the people that excused a person from penalties for the sins that he or she committed. And why i would imagine people found that being a bad thing probably cause they would think that if you did something like a crime that you should pay for it. By death
According to google it says "Acting on this belief, he wrote the “Disputation on the Power and Efficacy of Indulgences,” also known as “The 95 Theses,” a list of questions and propositions for debate. Popular legend has it that on October 31, 1517 Luther defiantly nailed a copy of his 95 Thesesto the door of the Wittenberg Castle church." So from what im getting as it's almost like he did that to make a type of statement.