Huh? Luther's princes battled Catholics? When? Charles V the Holy Roman Emperor ordered that Luther and his followers all be arrested and burned at the stake--along with all of his books. The year after Luther died, in 1547, Charles tried it in the Smalkaldic war--and nearly succeeded.
In the 1570s the French systematically murdered TENS OF THOUSANDS of Calvinist civilians there (and even about 500 were murdered in what is now Jacksonville, Florida, by Spanish Roman Catholics--who went on to establish St. Augustine, FL.).
Throughout the 1500s it was clearly the Roman Catholics who had the upper hand...with vast amounts of money, and most of Europe's Royalty...and Protestants were nearly always defensive, not offensive.
The 30 Years War of the 1600s...which had about 1/3 of Germany killed, started on religious lines, but soon changed to nationalist lines...(French and German Catholics (or Protestants)found it easier to kill each other, than to keep alliances to kill opposite religionists of their own nationality).
To quote your own shtick, "what are you smoking?"
You've never heard of Luther's essay "Against the murderous and robbing rabble of Peasants"?
Luther called upon the princes to slaughter the offending peasants like mad dogs and held out as a reward the promise of heaven.
More than 1000 monasteries and castles were levelled to the ground, hundreds of villages were laid in ashes, the harvests of the nation were destroyed and 100,000 killed.
Glad I could help.