Radeno

Is a common knowledge that Islam,Judaism,and Christianity is originated from Middle East. All of them become know to world because famous religious Figure such as Prophet Muhammad(Islam),Musa/Moses,Isa/Jesus. All of these peoples were Middle Eastern who spread these religion that believe in One Almighty God only. 

The interesting part about this is there big chance that either Musa/Moses and Isa/Jesus called the Almighty God as "Allah" same as Prophet Muhammad. 
This can be proven by the fact that all of them is Arabian/Middle Eastern and they probably speak similar language Arabic, also in Arabic if you want to say the word "God" you have to say the word "Allah" which is mean "God" in Arabic. So there's big chance that when Musa and Isa want to call "God" they say Allah the same as the Muslim, which mean they're Muslim

All of these can debunk the common believe in Christianity and in Judaism that they have different Almighty God,All of them basically worship Allah