As it turns out, it could not. Luther was not immediately burnt for a heretic; he was allowed to present his case in court and had a powerful effect on the populace. He also had a powerful patron and protector in the Elector of Saxony, who shielded him from the ecclesiastical authorities. In addition, the media explosion brought on by the printing press spread his message much further than it otherwise might have gone, and made him the focus for all sorts of religious, spiritual, political, and economic discontent. The right to read and interpret scripture lead to the throwing off of the chains of papal and ecclesiastical authority; and taking this to mean political and economic freedom as well, there were widespread revolts among the German peasantry. This horrified Luther and many of the civil powers.
The deep belief that religious uniformity was essential for political and and social stability made heterodox opinions a potential act of treason. It was not the desire of the intellectual reformers to challenge civil authority, but it was a consequence. The German states were small political units: principalities, duchies, electorates, and so on, all theoretically owing loyalty to the Holy Roman Emperor as overlord, but most exercising a fairly independent course a lot of the time. As the leaders of these states made their choices for or against the new opinion, their populations went with them (like it or not). For many, the attractions of "nationalizing" church property was a powerful incentive to become a reformer. Political alliances were made and remade in the name of religion throughout the rest of the century. ( I got this from www.lepg.org/religion.htm)



