I think Islam is totally a copy of Jewish Religion of Yasrab (Medina )
1, All the stories in Quran are from Jews almost!
2, Khoser/ Halal meat
3, Pig Forbidden
4, circumcision
5, Parda veil of hairs for women and Dhari for Men
6, Women segregation
7, Madrasa system ... Jewish Children learn by heart the Thorah and Muslim Quran
8, Calendar by Moon
9, Culture of Fasting from Jews and Christians
10, Slavery (In Judaism gentiles, In Islam Kafirs and even Islam adopts some Arabian Pagan traditions of Slavery)
11, Animal Sacrifice (The Jewish story of Abrahim and his son Ishaq was changed into Islam as Abraheem and his son Ismael and to claim it more forcibly Eid ul Azha was introduced!
12,Salah and Kibla (Jewish prayer is also called Salat) towards Jerusalem Temple, Muslims also offered towards Jerusalem Temple in early years and later on changed to Arab Pagan Temple Kaba
If we analyse the History it seems that the rivalry between Jews and early Muslims started after the change in 11th and 12th above mentioned Points and Islam adopted the path of Arab Nationalism
When Jewish tribe Banu Quraza was massacred its 900 males were butchered ... If we combine the women and children population it could be well over 4 thousand people
Remember in the Battle of Badar there were only 313 Muslim adult males... If we combine the population of Banu Quraza and other 2 Jewish tribes of Medina , it seems that Jews were a big Majority of Media at the time of Muslim Migration to Media and Median became a sanctuary for Muslims
It is evident from the population analysis that Jews helped and supported Islam to grow among Pagans of Arabia (with everything Jewish in it) in its early days!