Within a few years of Mohammed’s death, the jihadists had fought their way across formerly Christian North Africa, through Spain and into France.
They later conquered the Holy Land, and almost all of south-eastern Europe, and fought their way all the way into Austria.
After that they controlled the Mediterranean and imposed a dark age on Europe as trade was cut off and it became dangerous even to live on the coast due to slavers and pirates.
True, and was on the verge of taking over all of Europe till they met The Hammer (Charles Martel). The question is...Who will be our Charles Martel today?