There are distinctions between Christianity and Islam.
Yes.
Christianity has a hierarchical structure
? Some forms of Christianity, as most human organisations.
and has also undergone a reformation. The New Testament was a new covenant
Yes. You didn't mean to say the New Testament was a reformation?
What do you think reformation was? Why do you mention it here as statement without any qualification? The Reformation was not a change in Christianity. It was a split. Just like others before. Are you aware of them?
and they tend not to pay attention to all the nastiness of the Old Testament. Notice there has been an absence of crusades recently?
What? Are they supposed to be linked?
True that much of the Old Testament has been overlooked or superseded. But the 10 Commandments are still important, and the basis for what is considered a sin. As well as other aspects.
You may notice that many Christian groups do take the Bible literally, right up to the 7 days of Creation. :)
The reformation saw that it needed to change.
Yes, but the Catholic Church underwent something called Counter-Reformation.
We tend to not see Christians invading other countries in the name of religion any more.
Clue in "anymore".
The bible is also largely seen as the inspired word of God.
And by many as the literal word of God.
Islam is the final revelation, it supersedes all other religions.
So does Christianity. And Judeism. For their followers. :)
It is the perfect, divine word of God and there shall be no challenging of the perfect Koran.
So does the Torah and Bible for some followers.
There is some nasty stuff in there and Muhammad was a war lord.
And in the Bible, as God leading the way of armies*
Extremists follow it to the T.
Most extremists in every corner tend to follow their rule book to a T.
Isis take the Koran absolutely literally, believing themselves to be the only true Muslims. They reject more tolerant minorities, such as the Ahmadi's, as infidels.
And? Are you saying there are more tolerant groups within Islam? Aren't you contradicting yourself?
There has been no reformation and there is no recognised hierarchical structure to offer authoritative rules to govern Muslims.
There have been splits as for Christians. Christianity also doesn't fall under one authoritative figure.
There has also been no reformation. This is desperately needed and it needs to come from the more moderate Muslims. But the more dangerous elements of Islam, such as Jihad, is a central tenant of the perfect religion.
You're repeating yourself there.
I really don't see what you expect. There are moderate Muslims. There are moderate Muslim groups. There are extremist groups. There are political/violent groups that adopt Islam for their purposes.
The same happens and has happened for most religions, including Christianity.
You should also look at Jihad and the different meanings it can take and how it's interpreted by various groups.