And what do you base your assessment on? Do you happen to have read the texts from all three and viewed them in the context of when they were written or are you simply basing your assessment off of a few passages from each or off of what you've heard a? I have and there is much more in common than the "big differences" you seem to believe exist. It is the perpetuation of the belief that we have more separating us as human beings- religious vs. atheist, Catholic vs. Jew, Catholic vs. Protestant, Muslim vs. Christian, etc- and the perversions of teachings by a minority for personal gain in all religions that has made religion in general one of the leading causes of traumatic suffering and death throughout history. Please do not be a part of that problem by espousing misconceptions.
My bad, probably should have mentioned something about the global religious studie courses which centered around literary comparison between the western Bible and the Qu'ran.
So I'm basing that off of more than "a few passages" or "the perversions and teachings by a minority." There are similarities of course, but this is to be expected if one takes into consideration that portions of the Qu'ran were most likely adopted from the "Christian" oral tradition. Oh, that's not necessarily a "perversion by a minority" either.
You also cannot argue that the in modernity the religions have taken different directions philosophically....great, another thread on it's way to being locked. You're welcome to PM me.