People tend to forget that after the Western Roman Empire started coming apart, the Eastern Roman Empire (the Byzantine empire centered in Constantinople) was still going strong, until it fell to Muslim invasion
It was Muslim raiders, pirates and bandits who helped KEEP Europe in the Middle Ages. Muslim pirates stopped trade in the Mediterranean, cut off contact to India and China, and generally made a feudal existence necessary to survival.
And, no, the Arabs did not invent "Arabic numerals" or algebra. That was stolen from Indian mathematicians by Arab conquerers
To engage muslims in argument over anything is spitting in the wind.
While the word “Renaissance” is usually refered to that period which great works of art, literature, music, etc., flourished, it should be remembered that a lower definition of the word means - “a renewal of life, vigor, interest, etc.; rebirth; revival: a moral renaissance.” So, there is some truth to the statement because you cannot have a renaissance if you were at the top. Being hamstrung by Islam for centuries is the main reason the Renaissance occurred.
No doubt islam contirbuted alot back in the day.
But how can one brag when all of the progress is in the rear view mirror?