Were the Muslims viewed as barbarians similar to the Mongols, and as a people who only specialized in war? Or, were Muslims advanced enough to teach Europe scientific advancements? Did they invent any new science? Did they help world civilization progress?
Moors were more advanced than Europe during the Dark Ages (a period that represented a low point in European civilization). Moors had knowledge of algebra, geometry, and other forms of mathematics several hundred years ahead of the Europeans. As such, they also had more advanced trade practices, as well as access to more trade goods such as silks and spices via the Middle East.
Moors occupied and made their mark particularly in Spain. Their knowledge (including navigation) seeped out into that country (and Portugal) giving those countries a lead in the race to the New World. Until the Spanish persecution, Moors also handled much of the trade of Spain, which is why that country prospered in the 15th century (relative to the rest of Europe), but lagged behind in the 16th century (after the Moors were driven out).