Quite right with respect to the alleged “Muslim accomplishments” in science and math, etc.

See link below:

http://archive.frontpagemag.com/readArticle.aspx?ARTID=29404

Most of these accomplishments were in fact made by Coptic, Assyrian and Nestorian Christians employed by the Muslim leaders.
Indeed, some recent research indicates that the Muslim claim of inventing “zero” is also false. Zero, having been used as early as the Babylonian Empire.

But if one is saying that the Muslim accomplishments AMOUNTED to zero, then one is correct!