Terrorism is not explicit in the Koran. The Koran preaches the war against enemies of Islam, but explicitly forbid to kill women, children and elders. This is one difference between the bad effects of the Bible and the Koran among others.
Could you give evidence that the Quran explicitly forbids killing of women and children and the old?
I know there are verses that you could probably surmise that innocent lives should be spared according to the Quran but this only through interpretation.
On the other hand I don't know what to make of this one, Quran 8/12:
Yusuf Ali: Remember thy Lord inspired the angels (with the message): "I am with you: give firmness to the Believers: I will instil terror into the hearts of the Unbelievers: smite ye above their necks and smite all their finger-tips off them."
I've known an Islamic group who proudly claimed to be strictly adhering to the Sunni school and their imams, and who within a period of few years completely changed their view on suicide cihad and (for then) excused those who kill children and women in the process of their cihadic attacks. I don't know how far they went with their change of "fiqh"-based ideas on cihad by now.
And why do we focus so much on the "killing" those non-fighting parties while the whole expansion of Islam left from its start a large geography filled with widows that ended up slaves and sex slaves for the rest of their lives, orphans that ended up in the same life-journey like their mothers, and older people not much in a better state?
Does Islam promote and encourage its followers to expand itself though killing others "if necessary" ?
Yes.
Did it happen?
Yes. (And mostly, if not only, so).
Will it happen again?
........
........
What abrahamic religions "really" tell of "innocent" human lives anyway?
Quran included Bible stories in which God doesn't distinguish the "guilty" from the "innocent" when it comes to mass-punishment. (God's own reasons).
And today, as always, humans and babies die from diseases, sickness and disasters "for God's own reasons" like bugs.
I think the faithful is taught not to value any human life if God's purpose is at work.