You are simply wrong and before you come back with the tired old part about being voted on or passed by the Supreme Court keep this in mind. Slavery and segregation among many other atrocities were voted on and passed the Supreme Court. Being voted on or passing a court decision does not mean that they are right or moral.
You are so wrong it hurts. The government does not ban you from saying this. It does provide penalties for doing so frivolously. Nice try.We already have regulations on free speech that everyone agrees with; for example, you don't think people should be allowed to shout fire in a crowded theater.
And yes, you need 2/3 of the states to agree to a constitutional amendment. Do you think that will fly?
Why are you so supportive of giving up our Rights? Why do you want to enslave and kill millions? Why are you so against a weapon that is less dangerous than fists, motor vehicles, and hammers?
Why are you so egotistical, arrogant and elitist to think that law abiding citizens should not own something that is less dangerous than fists, motor vehicles and hammers?
Why do you and others think that you know better than the founding principles that have proven for over 200 years to serve us better than any other form of founding principles yet in existence?