Just as if a person attacks and happens to be a Muslim, may or may not have to do anything with Islam. But still Islam is put as the criminal, instead of the human. read more
As you say 1:"No significant original achievements arose." Many new inventions arose. Eg: modern surgery, the first flight(before the wright brothers), the basis for the modern camera, algorithms, astronomy etc etc. read more
. The claims that Islam had a remarkable golden age are often exaggerated, and are not well supported by physical evidence. read more