Islam and Christianity are often viewed as two distinct, separate offshoots from Judaism, but a perspective where Islam is itself a descendant of Christianity is a useful lens. The founders of Islam were well aware of Christianity when Islam was founded, and while they reject the Christian Bible (both new and old testament) and its teachings as likely inauthentic, it seems that there are many properties (for example, the fervor with which they present their religion to the outside world) of Islam that it receives from Christianity that are not present in Judaism. (Islam also recognizes Jesus (or Isa) as a prophet, but that is secondary to the point I am making)
Islam and Christianity are often viewed as two distinct, separate offshoots from Judaism, but a perspective where Islam is itself a descendant of Christianity is a useful lens. The founders of Islam were well aware of Christianity when Islam was founded, and while they reject the Christian Bible (both new and old testament) and its teachings as likely inauthentic, it seems that there are many properties (for example, the fervor with which they present their religion to the outside world) of Islam that it receives from Christianity that are not present in Judaism. (Islam also recognizes Jesus (or Isa) as a prophet, but that is secondary to the point I am making)