Simple.
Leftist judges aren’t where they are in order to apply the law to the case.
They, and any leftist in journalism or academia (you name it), are there in order to mold society as they see fit.
Don’t expect any “consistency” of ruling from leftist judges, you’ll drive yourself nuts trying to force consistency on them. The only consistency you’ll get is the advancement of liberalism/collectivism/anti-individualism/anti-traditionalism.
They go into a case with a pre-determined social outcome in mind, and then spend all their time searching for justification of the ruling they must make in order to achieve that outcome.
If anything, the folly of not protecting your rights with a series of SC decisions should become more focused in people's eyes ... Just because the Constitution says it is, doesn't necessarily make it so. In this one case, it may be that, that is true.
There is going to be an attack on the Second Amendment by the Obamunists, we need to read and understand how to best defend from a common man's language of doing things, in words the public may be able to grasp. Might be pushing the last point to far when it comes to Obama voters, but nevertheless, it will need pushing.
This is a very good article from HLR, can be used to get some markers ready.