First of all, this realization isn't "logic" but the constitutional Law of the Land. It's bedrock, regardless of how people might think it might affect them. We don't suspend the rule of law for the tyranny of the rule of man because doing so suits our point of view.
leaves us without Second Amendment protection against state and local laws limiting gun rights. Thats a hard pill to swallow.
This is where "logic" comes in. How is the rule of law of the Constitution a problem for us? If enough of us find that something in the Constitution is a big enough problem, then the Constitution itself has provided a means of changing it - through the amendment process - not through activism on the Left or Right.
Given all of that, I disagree that prohibiting the federal government from enforcing what the Constitution has not given it power to enforce leaves "us without Second Amendment protection". The structure of the U.S. constitutional republic greatly favors local governance from the states down to the individual. The people of each state are free to choose what kind of gun rights their state should adopt, so you are certainly not left "without Second Amendment protection".
Beyond that, what is the source of the greatest threat to your right to bear arms? The states? Hardly. Most, if not all states uphold the right to bear arms. IT IS THE FEDERAL GOVERNMENT that is the greatest threat to our right to bear arms. Same with abortion. Same with marriage. These things are NONE OF THE FEDERAL GOVERNMENT'S BUSINESS.
The only legal bulwark between free American People and tyranny is the Constitution. When one suspends the Constitution to uphold what he believes to be morally right, he is removing the only protection between his freedom and tyranny. And it helps to remember that the Constitution is mainly a restraint on the limited, enumerated powers of the federal government.
If you don't like the way the people of your state have voted in an important area to you, you have the option of moving to another state. Worst case, it is inconvenient. But giving power unconstitutionally to the federal government, although it may seem suit your particular interests in the short term, will in the long run destroy the very life and freedoms you hold dear.
You make a good argument. Hard to disagree. I will ponder it s some more.