I'm an ordinary Muslim and I condemn all acts of violence because they totally against Islam. Do you know the world "Islam" means peace?
These Muslims extremists are Muslims by name only, they follow nothing of what Islam teaches...
I beg to differ mate. The Koran is teaching them quite a few interesting things.
A few quotes:
"Slay them wherever you find them...Idolatry is worse than carnage...Fight against them until idolatry is no more and God's religion reigns supreme." (Surah 2:190-)
"Fighting is obligatory for you, much as you dislike it." (Surah 2:216)
"The only true faith in God's sight is Islam." (Surah 3:19)
"Believers, do not make friends with any but your own people...They desire nothing but your ruin....You believe in the entire Book...When they meet you they say: 'We, too, are believers.' But when alone, they bite their finger-tips with rage." (Surah 3:118, 119)
"If you should die or be slain in the cause of God, His forgiveness and His mercy would surely be better than all the riches..." (Surah 3:156-)
"Seek out your enemies relentlessly." (Surah 4:103-)
"Believers, take neither Jews nor Christians for your friends." (Surah 5:51)
"Believers, when you encounter the infidels on the march, do not turn your backs to them in flight. If anyone on that day turns his back to them, except it be for tactical reasons...he shall incur the wrath of God and Hell shall be his home..." (Surah 8:12-)
"Prophet make war on the unbelievers and the hypocrites and deal rigorously with them. Hell shall be their home." (Surah 9:73)
"Believers, make war on the infidels who dwell around you. Deal firmly with them." (Surah 9:121-)
Remember also that the Koran tells Muslims to lie to the infidels until their numbers are enough! (al-Taqiyya)