@WhoWas (A Response to his answer)
Let me analyze the verses you quoted.
(Quran 5:33) says "those who wage a war" NOT innocent people!
(Quran 8:12) That is a description of hell, where people like Hitler will be and if you have a problem, with all that happening to Hitler then you are really cruel chap.
(Quran 9:5) You quoted verse 5, but the next verse 6? Funny:-) Because 9:6 says that if the enemies want peace, then grant them peace and even take them the enemy to a place where the enemy would be secure. 9:5 is only talking about fighting in the Battlefield.
(Quran 17:16) Talks about people, who wronged others and thus even themselves and every court of law is just and serves justice. So does the court of the Almighty God by serving justice to the those wronged and doing justice who wronged.
Jihad only means "to Strive to Struggle". The word used for fighting in the Qur'an is "Qital" and Islam only allows fighting in self-defense and against tyranny and oppression. Islam condemns the killing of any innocent human being. As the Qur'an says in Sura al Maidah Chapter 5 Verse 32, "if anybody kills any innocent human being, lest it be for murder or spreading corruption in the land, it is as though he killed the whole humanity and if anybody saves the life of any innocent human being it is as though he saved the whole humanity." Meaning that if anybody human beings kills any innocent human beings, it is as though the killed the whole humanity. So you can NOT blame Islam for what individual terrorist did on 9/11. As Islam condemns and being Muslims we condemn it.
@Answer to the Original Question!
Yes, Islam is violent against oppression, tyranny, injustice, falsehood and tumult, but Islam is tolerant and loving towards peace, justice, love and compassion.