Again, I am focusing on the religions in their somewhat modern form. All of the Biblical religions had violence, slavery and worse. I was just curious what about, I guess, "modern" Judaism people found to be violent.
MotionMan
The problem is that the conservative sects of any religion will use the old texts to continue some of those ideas. I went to an orthodox synagogue a few years ago (my cousin is orthodox) where they offered a prayer for the troops, where they asked God to protect our soldiers and "kill all of our enemies". More recently, I was at a conservative synagogue, where they used the book of Esther to argue that a preemptive strike and war with Iran would be justified.
My point is not to claim that Jews are evil. Far from it, but they are human like all others. On the other end of the spectrum, the liberal (reconstructionist) synagogue I attend is far less hawkish. We have introspective discussions about why the Bible discusses laws of slavery just after the Israelites were freed from bondage, or how Abraham could even consider sacrificing his child, and the damage it caused Isaac.
There are many inherent advantages to Judaism as well, some of which you hinted at. Primary among them is that Jews do not evangelize. We have no interest in killing people under the guise of "saving their souls", as so many other religions have done. The flip side of this coin is that we as a culture have tended to lack an interest in interacting with other peoples, feeling that we are the chosen people, and that is enough. This gives us a lack of empathy for others, and perhaps an overgenerous sense of self worth.
I suspect at the root of your question is the sense that we have, for the past couple thousand years until the last 50, been the victims and not the aggressors. This is true, but is more reflective in my opinion of the fact that we have been the minority population, and thus not in a position to abuse power, rather than by some intrinsic trait of our religion. You can see how that has changed now in Israel, where we wield power no differently than any other majority population.
Judaism, and we as modern Jews, are not any more violent than the rest of the world, but neither are we inherently any less so.