“I do not believe that states should ignore federal gun laws that are constitutional.”
Do you mean laws that are constitutional? Or laws that the Supreme Court has ruled are constitutional?
There’s a big difference. The Constitution does not say that Supreme Court rulings on constitutionality are final. In fact, most of the founders regarded state decision as to constitutionality in this regard as an important check on the power of the feds.
Indeed - most leftists, being humanists, ascribe to the “no objective truth” worldview, which translates into “the truth is whatever those with power say it is”.
That's why I said, "However, states have a moral obligation to ignore all unconstitutional federal laws, whether or not the Supreme Court steps up to overturn those unconstitutional laws." The states and the people are the final arbiters of Constitutionality and the fundamental source of governmental power. We agree.