Do you recognize Islam and Muhammad? If the answer is yes, which is the final religion, Christianity or Islam?

Do you recognize Islam and Muhammad? If the answer is yes, which is the final religion, Christianity or Islam? If your answer is “Islam”, do you then declare Christianity as over, i.e. should not all Christians convert to Islam?
Answer: Please start by reading earlier in this webpage in our book chapter 4, Muhammad and the Christian Faith and especially part IV, 3-5 and the excursus at the end of the same chapter. Furthermore, chapter 12 of the same book: The Heart of Christianity shows what constitutes for Christian believers the core of their faith. It is the direct, self-emptying love of God, which lights the path of the believer in the teachings, the life, suffering and death of the resurrected Jesus, the Messiah. Christians meet Jesus and the power of His love in prayer, faith, acting in the community of all Christians, in the Church. He or she is called to witness to this love through a life of service and dedication to other people. Wherever Christians discover these traces of the love of God in Christ Jesus, also in the life of Muslims, who are fully devoted to God and to the service of mankind, they will thank God who offers His gifts to all people. Christians will connect as much as possible with such people and their works. In this sense, the Catholic Church, therefore, "exhorts her sons, that through dialogue and collaboration with the followers of other religions, carried out with prudence and love and in witness to the Christian faith and life, they recognize, preserve and promote the good things, spiritual and moral, as well as the socio-cultural values found among these men“ (Paragraph 2). And it calls on Christians and Muslims in particular: “to forget the past and to work sincerely for mutual understanding and to preserve as well as to promote together for the benefit of all mankind social justice and moral welfare, as well as peace and freedom”.“ (Paragraph 3) (2. Vatican Council: Nostra Aetate). [Web reference: http://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_decl_19651028_nostra-aetate_en.html]