"I have read that our Bible, along with other peoples religious books have all been taken from much older books, and that is why they all have a savior that does esactly what Jesus did....So how can people say that the Muslims' Allah is not the same God as our God? "
 
Plain and simple- The Koran says that Allah had no son.  So, this is certainly not the God we serve, whose son is Jesus our savior