It used to be called the Crusades. Now it is called terrorism.
It's not like Muslims ever mistreated anyone:
" April 1998, Elikia M’bokolo, wrote in Le Monde diplomatique. "The African continent was bled of its human resources via all possible routes. Across the Sahara, through the Red Sea, from the Indian Ocean ports and across the Atlantic. At least ten centuries of slavery for the benefit of the Muslim countries (from the ninth to the nineteenth)." He continues: "Four million slaves exported via the Red Sea, another four million through the Swahili ports of the Indian Ocean, perhaps as many as nine million along the trans-Saharan caravan route, and eleven to twenty million (depending on the author) across the Atlantic Ocean"[89]
In the 8th century, Africa was dominated by Arab-Berbers in the north: Islam moved southwards along the Nile and along the desert trails."