O People of the Book (Jews and Christians)! Do not exceed the limits in your religion, and attribute to God nothing except the truth. The Messiah, Jesus, son of Mary, was only a Messenger of God, and His command that He conveyed unto Mary, and a spirit from Him. So believe in God and in His Messengers ... (Quran 4:71)
So if a Christian converts to Islam while retaining his belief for Jesus like belief as Jesus being the Messiah then how the Christian community views such a person?