This guy is telling the truth. Islam is a violent religion (actually "cult"). Those slaughtering infidels are following the letter of Islamic law. Nonbelievers are considered subhuman so it is perfectly OK, under Islamic law, to kill every man, woman and child who does not follow Islam.
Any "peaceful" Muslims are not following the text of the Koran (Quran).
It is the religion and its written foundation which are fundamentally barbaric in nature.