So, in your view, the right is not protected federally but at the state level.
What he means is that the State has the option of infringing your RKBA, and the Second Amendment doesn't stop them.
Let me ask you this: Do you buy his claim that the Second Amendment is a check on Congress's power in I.8.15 & I.8.16?
Yes.
If it was protected federally it would have to be protected equally among the states. It's not. Some states protect concealed carry and some don't. Some have an AWB and some don't.