The verse for today is 85 from Surah Al-Imran, “And whoever desires other than Islam as religion never will it be accepted from him and he in the Hereafter will be among losers.” which is frequently used by extremists to justify violence. What they chose to ignore is the fact that it followed a verse explaining that God does not differentiate between people of all religions. Read verse 84 with me: “Say we have believed in Allah and in what was revealed to us and what was revealed to Abraham, Ishmael, Isaac, Jacob, and the Descendants (al-Asbat) and in what was given to Moses and Jesus and to the prophets from their Lord, We make no distinction between any of them and we are Muslims ( submitting to him.” The broad definition of Islam has been ignored on purpose to justify violence against Jews and Christians. There is no reason in Koran to commit violence against people of the book (Scripture).
The key to understand peaceful Islam is to explore the broad definition of Muslim in Islam. For more on the subject, follow my blog and comment as you wish.