I've heard that Christians have more in common with Muslims than with (what seems to be the 2nd most "popular" religion for most Christians) Judaism...
I guess if Muslims accept that Jesus was the Messiah, then that would be true since Jews reject that claim.
Hmmm... Well, there's a book out now called, "The Case for Islamo-Christian Society" and that's the author's claim. But I've only read the introduction... But I don't want to get into the obvious implications of removing "Judeo" and how pissed off most people would be if a Muslim were to start doing that. I don't think that was the author's motivation... but if judged by it's cover, as most people do, it looks bad.
There's cases for similarties with both.
From a legal perspective Islam is closest with Orthodox Judaism. Similar Kosher laws, social structure, rules for modesty, etc.
Islam is also closest to Judaism in the conception of God. Strict monotheism. Belief in the one God of Abraham without a son, or any physical manifestation. A genderless, invisible God. The Trinity is uniquely Christian.
We also share Judaism's conception of the Messiah, not as a literal physical son of God (Although we accept the virgin birth), but a spiritual son, as David is referred to as in the old testament. Although Jews are still waiting, may God guide them. Muslims view Jesus as the anointed, the most unique of prophets, and the one to return on the day of recompense. As he says, he was sent to fulfil the Jewish scripture.
But Muhammad is allot like Jesus in that both began their mission alone, and established an entirely new nation, while all the prophets of the ancient Jews brought messages to a specific tribe of people. Both Jesus and Muhammad spread the message in the face of a pagan society. And both religions initially faced conflicts with existing empires... Unfortunately each other at times.
Both Christianity and Islam are characterized as the catalyst of huge advances in science, philosophy, and theology. Often in conjunction with each other.
I wish people focused more on those period of cooperation... we could likely use it as a model for a modern solution.