Yes, the old “cowards” fallback. When you don’t have a factual argument just revert to name-calling. 
“Hiding behind an amendment”- It’s called following the supreme law of the land. And the amendment was enacted when all rifles, those in the possession of the military and those in the possession of the general public were equal, we’ve let the purpose and the spirit of the 2nd Amendment fall by the wayside and allowed the “standing army” greater firepower over us. The Founders would be appalled.
And if by representing the people of their congressional district, and therefore winning the next election, instead of harboring an irrational fear of machined metal tools, our representatives in government fail to allow the criminal element among us to dictate our rights and freedoms, I would say to Barbara and her ilk, “Get over it”.