All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
Such a general statement is not correct. That is because non-Muslims are not in the same degree. There is Al-Mu‘aahad (i.e. the non-Muslim with whose people Muslims have a peace treaty) and Al-Musta’man (i.e. the non-Muslim who has entered the Muslim land and has been guaranteed safety) and the life and wealth of both are protected by Sharee‘ah (Islamic Law).
On the other hand, there is the non-Muslim who is at war against Muslims, and such is the one whose life and wealth are not protected by Sharee‘ah.
Allaah Knows best.