This is a common Muslim error which comes from a lack of knowledge about the Bible. But the error is easily corrected.
Prior to His ascension to heaven in Matthew 28, the Lord commanded His followers to preach the Gospel to and make disciples of all nations. Do you know who was the firstGentile to receive Christ as his Lord and Savior and begin the fulfillment of that mandate?
Painting: "The Baptism of the Eunuch," c. 1626, by Rembrandt
26 An angel of the Lord spoke to Philip: “Get up and go south to the road that goes down from Jerusalem to Gaza.” (This is the desert road.)
27 So he got up and went. There was an Ethiopian man, a eunuch and high official of Candace, queen of the Ethiopians, who was in charge of her entire treasury. He had come to worship in Jerusalem
28 and was sitting in his chariot o…