Muslim Jesus: Great Prophet?

[Confused Ape]

yet, the people around him, who refused to believed, were damned (the dark ages is one of the examples of that damnation).

It depends on how one defines Dark Ages.

http://en.wikipedia.org/wiki/Dark_Ages_(historiography)

In the 19th century, the term "Dark Ages" was widely used by historians. In 1860, as John Barber notes, Burckhardt in The Civilization of the Renaissance in Italy "formulated the classic contrast between the medieval period as the 'dark ages' and the achievements of the Renaissance as a period of revived antiquity that included literature, elegance and erudition".[31] However, the early 20th century saw a radical re-evaluation of the Middle Ages, and with it a calling into question of the terminology of darkness,[10] or at least of its pejorative use. Historian Denys Hay exemplified this when he spoke ironically of "the lively centuries which we call dark".[32]

and

However, from the mid-20th century onwards, other historians became critical of even this nonjudgmental use of the term for two main reasons.[10] First, it is questionable whether it is possible to use the term "Dark Ages" effectively in a neutral way; scholars may intend this, but it does not mean that ordinary readers will so understand it. Second, the explosion of new knowledge and insight into the history and culture of the Early Middle Ages, which 20th-century scholarship has achieved,[39] means that these centuries are no longer dark even in the sense of "unknown to us". To avoid the value judgment implied by the expression, many historians avoid it altogether.[40]

about the other teachings, they were lost. The quran described how the monks changed the bible, bit by bit, in order to increase their budget , for example, putting a new religious worshipping type, called the pilgrimage to monks' shrines, which include paying gold to monks to "cure sickness" with the will of jesus christ.

obviously, the changing of the bible brought gold to the church.

I don't recall anything in the Bible which teaches that Christians should venerate what they regard as Holy Relics or pay priests for indulgencies. There's also the problems caused by conflicting theology. This isn't to say that the Bible has never been changed for political purposes because there is evidence that it has been.

that's why nobody knows what the teachings of jesus were. They are all changed.

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Why are Muslims 100% sure that nothing in the quran has ever been changed over 1300 years?