Factors motivated Martin Luther's attacks on the peasants and their revolt

What factors motivated Martin Luther's attacks on the peasants and their revolt ? What steps did he advocate taking? Do you draw any comparisons in his reasoning and/or actions?   Place Luther in the historical context of the period (what was happening that might of influenced his perspective?) Remember, when responding to questions always include: who, what, when, where, how, why; why historically important; draw comparisons when applicable; use quotations effectively; and provide examples.