Apologist Joel Furches highlights the core beliefs of the fastest growing religion in the world and compares it to the two other Abrahamic faiths

The word ‘Islam’ literally means “to submit”. In this case, it is full submission to the will of God. As such, Muslims will claim that Abraham, Moses, the apostles and even Jesus himself were Muslims insofar as they submitted fully to God. 

The reason Muslims would not extend this courtesy to modern Christians is that Christians worship Jesus and the Holy Spirit as equivalent to God which is, by their way of thinking, a form of polytheism. The popular Muslim thought as regards this shift from the early apostles to modern Christians is that Paul of Tarsus corrupted Christian theology and opened it to this notion that Jesus was not merely a son of God, but God himself. Prior to Paul, Muslims claim, Christians were, in essence, Muslims… (Register to read the rest of this article)