Muslim people - are you descendents of Abraham through Hagar/Agar and her son Ismael?

Do not say anything bad about their religion, they are told by the Quran to fight those who do not believe what they believe. "Fight those who do not believe in Allah or in the Last Day and who do not consider unlawful what Allah and His Messenger have made unlawful and who do not adopt the religion of truth from those who were given the Scripture - [fight] until they give the jizyah willingly while they are humbled." [9:29]