Hmmm. I appreciate the scrutiny and attention given to the words I use -- can you talk to Mrs. O. for me?

When I say arbitrary -- I mean that in light of the clear nature of the Bill of Rights intended to protect individual rights (and as reaffirmed by the court) it is arbitrary to not even attempt to identify legitimate, constitutionally protected, reasons to bear arms -- D.C. simply made a sweeping pronouncement against all firearms in the city -- thus my use of the term arbitrary, meaning "capricious, unreasonable, unsupported."
To say that a rise in handgun violence in D.C. now means the law is no longer "capricious, unreasonable, and unsupported," is an interesting argument but requires a leap in logic since death by guns has gone up since the ban and the standard is not you or me, but the constitution. The constitution says it is against the law, thus the D.C.'s ban is "capricious, unreasonable, and unsupported," by that standard -- the only one to be used as we discussed, and upheld as the standard by the court.
I hear you when you state that in light of increasing gun violence D.C.'s actions aren't arbitrary, but indeed they are because D.C. is utilizing another of the definitions for arbitrary, "decided by governmental authority rather than law or statute." When the D.C. government ignores the law of the land and decides for itself whether or not to apply the U.S. Constitution in its jurisdiction, it is acting arbitrarily by the very literal definition of the word. This is what I meant by their rationale for violation being "irrelevant." You state instances where the state found reason to violate the constitution for a compelling public interest. I will argue that these are usually instances regarding specific groups of people (mentally ill, felons) or particular times. Consider the sweeping dictation as was shown in D.C. -- compelling ALL citizens to behave a certain way at all times. Talk about arbitrary.
Enough on "arbitrary."
Now for handguns versus assault rifles. The D.C. law did not make the distinction -- I introduced it for argument's sake
From the D.C. statute...
...Except as otherwise provided in this unit, no person or organization in the District of Columbia (”District”) shall receive, possess, control, transfer, offer for sale, sell, give, or deliver any destructive device, and no person or organization in the District shall possess or control any firearm...
This is arbitrary with a capital "A." Had D.C. allowed handguns and outlawed assault rifles (or vice versa heaven-forbid) the supreme court would have had a different issue to deal with. Fact is, D.C. made it very easy for Scalia -- they made no attempt to find reasonable accommodation within the confines of the second amendment. The exceptions they listed primarily dealt with group affiliation with law enforcement - denying the "individual" right as we discussed.
Thus the grounds for my original assertion...
An outright ban on all individually owned arms is far different than a simple limitation on the types of arms necessary to reasonably defend oneself -- don't you think??
Lastly,I do indeed believe evolving societal norms do require new scrutiny given to the constitution, but this is far different than abandoning the tenants entirely (a la Ginsberg). For example, should Ray Guns (think Star Wars) become readily available, the court would be perfectly within its right to determine whether or not this new technology is reasonable to be used by an individual for self-defense or if it should only be the purview of the military or other organized governmental unit. This is far different than saying evolving society says we need to scrap the original intent of the founders -- that can only be done by amendment (and rightfully so, lest we be subject to the whims of an unscrupulous justice or justices).