in reading the book by the (now) Christian Mark Gabriel, a former muslim professor of islam at the al-Azhar University, Cairo, Egypt, the conflicting message of islam is not a result of different versions of the qu'ran, but rather a result of teachings from different parts of the same qu'ran. The qu'ran started out with peaceable moral-keeping writings, but then 'evolved' into a handbook for war, mirroring mohammad's personal descent into his mad warlike existence...
the later more warlike writings take precedence, supercede (replace) the earlier more peaceable writings...
but some islam sects and immam teachers concentrate on the earlier writings, hence the references to the 'peace-loving religion'...
but the true message of the qu'ran are the later writings,... the warlike and dedicated to world submission commands of the qu'ran,... and it is from these writings that fundamentalist islam takes its queue...
while the sunnis of islam, in reality, live a more peaceable existence than say the Shiite sect,... one of the most fundamentalist (warlike) groups, the wahabis, actually belong to the sunni branch... so it all gets quite convoluted...
adding to the confusion is the fact the sunnis and shiites have clashed with each other (and diverged in practice) since the days of mohammad's grandsons (when the split occurred)...
Mark Gabriel's book is an easy read and explains all this in a riveting fascinating way...