"Why do you need an AR15?"

[stanc]

The first 10 amendments to the Constitution make up the Bill of Rights. Written by James Madison in response to calls from several states for greater constitutional protection for individual liberties, the Bill of Rights lists specific prohibitions on governmental power. The Virginia Declaration of Rights, written by George Mason, strongly influenced Madison.

I think you need to re-read your own example. written in response and strongly influenced by George Mason. The Second Amendment was written with the concern and input and approval by many of the people at that time whom I have quoted and you disregard. James Madison gave full credit to George Mason for his influence and importance of the Second Amendment.

Calls for greater protection do not make the callers co-authors. Being influenced by another's writings does not make that other person a co-author.