Indeed.
However, as I am wont to observe whenever the "religion of peace" characterization of Islam is discussed, whether by the devious who try to push it, the deluded who believe it, or those who take the notion to bits as the linked article does, there is a more subtle and insidious problem with the relationship between Islam and peace:
In Semitic languages like Arabic, Aramaic and Hebrew, the root of a word is the sequence of consonants: Islam (submission) and salam (peace) have the same sequence of consonants, and thus in the Arabic-speaking mind are inextricably linked. A Muslim can in good faith assert that "Islam is a religion of peace" because the Islamic conception of peace is defective: Islam knows no negotiated peace treaties with non-Muslims, only "Hudnas", ceasefires that Muslims are free, even obligated, to abrogate when it is to their strategic advantage. Islam has no analogue of the "peace which passes all understanding" Christ promised his followers. In both spiritual and worldly affairs, the only peace Islam knows and the peace it promises is the peace between conqueror and conquered disarmed subjects, between master and submissive slave.