"The left believe the 2nd amendment is an anachronism and an embarrasment, and has no validity in today's world. The right believes that the 2nd amd is a critical bulwark of the defense of freedom, and against tyranny."
"The left believes that access to firearms make people kill people; the right believes that firearms are only a tool, to be used for either good or evil."
Most of the 'division' in America can be traced back to underlying differences that are evident in how the two groups view the second amendment, as you very eloquenly summarized.
Things will start to get intersting once the "domestic enemies of the Constitution" have a numerical majority, while the supporters of the Constitution have most of the intellect and work ethic in this country. The latter group also has more guns :-)