A call to repeal the Second Amendment

In a piece for Rolling Stone, Drexel constitutional law professor David S. Cohen calls for repealing the Second Amendment.  He argues that the right to keep and bear arms “is outdated, a threat to liberty and a suicide pact.”
From David S. Cohen,  Why It’s Time to Repeal the Second Amendment | Rolling Stone:

I teach the Constitution for a living. I revere the document when it is used to further socialjustice and make our country a moreinclusive one. I admire the Founders for establishing a representative democracy that has survived for over two centuries.

But sometimes we just have to acknowledge that the Founders and the Constitution are wrong. This is one of those times. We need to say loud and clear: The Second Amendment must be repealed.

[Keep reading. . .]

Instead of trying to interpret the amendment away, the strategy of most liberal jurists, the thought now is to just get rid of it.

How would you respond to his arguments?