No. Islam strongly and unreservedly rejects and condemns terrorism in any form and for any reason, whether committed by an individual, group or government.
In fact, according to Islam, no religion can sanction violence and bloodshed of innocent men, women and children in the name of God, since all religions came from God Who sent His prophets to establish peace in the world.
Islam placed an obligation on every Muslim to uphold peace. This concept is so deeply rooted in Islam that the Holy Qur’an describes true Muslims as those who:
'…walk on the earth in a dignified manner, and when the ignorant address them, they say, ‘Peace!’ ' (Holy Qur’an Ch.25: V.64)
Furthermore the Holy Qur’an champions the sanctity of life:
'…whosoever killed a person … it shall be as if he had killed all mankind; and whoso gave life to one, it shall be as if he had given life to all mankind' (Holy Qur’an Ch.5: V:33)
In his famous Farewell Sermon the Holy Prophet Muhammad (peace and blessings of Allah be upon him) said, that God had made the lives, property and honour of every man sacred, stating:
‘…to take anyone’s life or his property or attack his honour is as unjust and as wrong as to violate the sacredness of this day, this month and this terrirory.’ (Sihah Sitta)
This leaves no doubt that there is no justification whatsoever for extremism or terrorism in the teachings of Islam.