Based on objective fact, state constitutional provisions to protect the right to keep and bear arms are very much needed.
The states which do not have such provisions have the preponderence of infringements on the right to keep and bear arms.
Consider, they are: California, New York, New Jersey, Minnesota, and Maryland as well as Iowa.
Of those California, New York, New Jersey and Maryland have extreme infringements on the right to keep and bear arms.
This is not a failing of the system as written, it is a failing of the State legislature to follow the damn law.
Those purposing infringements on RKBA in those States should be tried, convicted, and incarcerated/executed via USC Title 18 Sec 242. Deprivation of Rights under color of Law.
Make a few examples and the rest will quit.
Putting a band-aid on a sucking chest wound won't hurt, but it won't help much either.
I understand that a California resident can get a carry license without too much trouble. impossible here in New Jersey.