His frustration here is related to the power that Catholics were trying to gain by appointing all the cardinals. It costs excessive amounts of money to do this which created pressure on the people and took the focus away from religion. Luther felt this was unnecessary.

Luther was discouraged by the Catholic Church and how they were looking for money in exchange for forgiveness of sins. His concern in this statement is how people are true to their religion and he doesn't feel as though Catholics have been and doesn't want that to happen in Germany.

Before this statement he is referring to religion and to the Lord and how he will judge all. I feel this statement is more of a scare tactic in setting the tone for what will happen if people don't follow Catholicism therefore sense the tone to be more political relating to power.

Here Pope Leo is accusing the Germans of being bitter toward the Catholic religion. His statement is showing that he condemns the Germans for not following the beliefs and in the interest of religion.