What is the fate of present-day Christians who believe that Christ is the servant of Allah and His messenger—are all of them in Hellfire?

The mere acknowledgment by some Christians that Jesus is a servant of Allah and His messenger will not benefit them. Rather, they must embrace Islam and believe in Muhammad (peace and blessings of Allah be upon him) and his Sharia, otherwise, they will be among the losers and the inhabitants of the Fire, because Jesus had foretold the coming of Muhammad (peace and blessings of Allah be upon him).