Islam, a religion of mercy, does not permit terrorism. Allah, the Exalted says in the Quran: “Allah does not forbid you from showing kindness and dealing justly with those who have not fought you about religion and have not driven you out of your homes. Allah loves just dealers. (Quran, 60:8).
"Jihad" means struggling or striving. Jihad primarily refers to the inner struggle of being a person of virtue and submission to God in all aspects of life. Jihad is not holy war as it is popularly propagated in the media. The Prophet Muhammad (PBUH) said that the greatest jihad is to struggle with the insidious suggestions of one’s own soul.
“…take not life, which Allah hath made sacred, except by way of justice and law: thus doth He command you, that ye may learn wisdom.” (Quran 6:151)
“…if any one slew a person - unless it be for murder or for spreading mischief in the land - it would be as if he slew the whole people: and if any one saved a life, it would be as if he saved the life of the whole people.” (Quran 5:32), Quran goes to the extent of saying that killing one person is equivalent to killing the entire Humanity and saving one is as though one has saved the entire humanity