> What the founders intended is that those that exercise their right to bear arms be members of a regulated militia.
"Regulated" doesn't mean what you think it means. In the context of the language in 1787, "well regulated" essentially meant "using standardized equipment".
>If all gun owners were compelled to be members of a militia...
You have this entirely backwards. By US law, you are probably already a member of the Militia:
"UNITED STATES CODE
TITLE 10 - ARMED FORCES
Subtitle A - General Military Law
PART I - ORGANIZATION AND GENERAL MILITARY POWERS
CHAPTER 13 - THE MILITIA
 311. Militia: composition and classes
(a) The militia of the United States consists of all able-bodied males at least 17 years of age and, except as provided in section 313 of title 32, under 45 years of age who are, or who have made a declaration of intention to become, citizens of the United States and of female citizens of the United States who are members of the National Guard.
(b) The classes of the militia are --
(1) the organized militia, which consists of the National Guard and the Naval Militia;
and
(2) the unorganized militia, which consists of the members of the militia who are not members of the National Guard or the Naval Militia."
As always, your "rights" have associated "responsibilities". Along with the right to bear arms, you have the responsibility to know how to use said arms and be prepared to take them up in defense of the nation and the Constitution.
As a militia member, do you know how to secure, maintain, and operate your arms? Do you even HAVE arms?
> tell the NRA they, as a group, will now be held responsible for the actions of their members...
Do you really think that all gun owners are members of the NRA? I assure you, they're not. NRA membership is about 4.3 million; number of gun owners in America, about 52 million. Further, the NRA is by no stretch of the imagination a "militia".
Further, the number of criminals with guns, compared with the number of responsible gun owners, is such a small percentage as to be ignored in most common circumstances.
> The meaning has been twisted over the years, but the original intent is obvious because it is literal.
The 2nd Amendment has not been twisted; it's a complex sentence, but not hard to understand. It is a dependent clause, followed by the independent clause. The independent clause, which stands alone, is:
"The right of the people to keep and bear arms, shall not be infringed."
If you don't LIKE this, you have only one choice: have an amendment passed repealing the 2nd Amendment. Good luck with that.