There is striking common ground here: a firm rejection of the Trinity, a strong emphasis on the oneness of God, and the belief that Jesus is not God but His servant and messenger. Islam shares and clarifies all of this — God is one, with no partner and no equal (Qur'an 112:1-4), and Jesus is honoured as the Messiah and a mighty prophet (Qur'an 4:171).
From that shared foundation, Islam asks the next question: has God completed His guidance? Muslims believe He sent a continuous line of prophets ending with Muhammad (peace be upon him), and preserved His final word in the Qur'an — for all humanity, awaiting resurrection and a just accounting before Him.