Terrorism can not be categorized as a Jihad; Jihad in the form of war must be clear which parties were involved in the war, like the war of the Prophet Muhammad who represents Makkah and Madinah against its allies. The reason for the war was mainly triggered by the tyranny of the Quraysh who violate the right to life of the Muslims who were in Makkah (including seizure of property and the expulsion of the Muslims).
Why do ye not fight in the cause of Allah, and (defending) the weak people, both men, women and children who all prayed: "Our Lord, remove us from the country (Mecca) people who do wrong and give us protection from You, and give us a helper from You! ". (Surah 4:75)
War in the name of Islam, but not enforcement follow Sunnah can not be called Jihad. Sunnah to enforce Islam begins preaching nonviolence!, Not in the form of terrorism, move to a safe area and receive missionary apostle, then actualize the Islamic community (Ummah), which aims to uphold God's power on earth.
"Fight those who believe not in Allah and not (also) to the day later and they do not forbid what has been forbidden by Allah and His Messenger, and no religion to true religion (the religion of Allah <-islam), (ie the ones) to the Book, until they pay the jizya with obedient they are in a state of submission. "