500 years ago, the great reformers Martin Luther and John Calvin warned the church about Islam. During this time, Muslim Sultan Suleiman the Magnificent invaded Europe on land and sea. In 1529, 35-year-old Suleiman the Magnificent sent 100,000 Muslim Turks to surround Vienna, Austria.
Martin Luther wrote: “The Turk is the rod of the wrath of the Lord our God. … If the Turk’s god, the devil, is not beaten first, there is reason to fear that the Turk will not be so easy to beat. … Christian weapons and power must do it… (The fight against the Turks) must begin with repentance, and we must reform our lives, or we shall fight in vain. (The Church should) drive men to repentance by showing our great and numberless sins and our ingratitude, by which we have earned God’s wrath and disfavor, so that He justly gives us into the hands of the devil and the Turk.”
As Baron Bodissey concludes,
We hear a lot these days about the necessity for becoming more educated about Islam, as if a fuller acquaintance with the Islamic faith would make the Legions of the Prophet seem less threatening and dangerous. We can see from these excerpts that the opposite is the case. Martin Luther was very well-educated in the scripture of the Mohammedans, and it only served to confirm to him that their religion was in fact demonic, a worldly manifestation of pure evil.
See Luther's comments here,
Not just Luther, but John Calvin also sounded a warning ...
As the Islamic threat intensified, reformer John Calvin wrote to Philip Melanthon in 1543 (“Selected Works of John Calvin: Tracts & Letters,” I: 373): “I hear of the sad condition of your Germany! … The Turk again prepares to wage war with a larger force. Who will stand up to oppose his marching throughout the length and breadth of the land, at his mere will and pleasure?”
On December 12, 1550 in a sermon on Micah 4, Calvin proclaims to his congregation “the Turks deny God openly, for to know God is to know our Lord Jesus Christ”
Sola scripture, as one of Calvin’s “five solas,” manifests itself heavily upon his view of the Turks. Calvin held a strong view of the Bible (both Old and New Testaments) as the only Scripture of God. Anyone who rejected it, namely the Turks, were “devils, for they do not keep themselves in the bounds of Holy Scripture.”
Katharina Beeler points out,
However, texts indicate that he (Calvin) may have found preaching to the Turks as unfruitful because he found them beyond reach, calling them “apostates having to be left to God, for they are alienated from true religion. He further declares them as “barbarians” and “the cruelest enemies,” stating again that “Satan deceived the Turks, he rules over them and they, as a result, are hardened in their errors, rejecting the grace by Jesus Christ” (Slomp 1995:137).
See Calvin's comments here.