what exactly is confusing to you about that term
Nothing. Both I and the people who wrote it completely understand the context in which it's used. YOU on the other hand, are inventing a completely new interpretation of the constitution wherein the document they wrote to limit the government's ability to infringe on your rights is suddenly (but just in this case!) suddenly the exact opposite. Which part of "shall not be infringed" are YOU have trouble with? Again, please link to any - even ONE - writing by a single author of the constitution that suggests, for a moment, that they intended the second amendment, let along the entire document, to be a limit on the people, in stead of a limit on the government. Go ahead, cite some heretofore undiscovered writings. Please!
What? You can't find any? I thought so.
we will have the founder's intent
The founders intent was to make sure that the government "shall not infringe" on the right of the people to keep and bear arms. Why? Because they also had to stand up an army ("militia") on occasion, and didn't want ANYONE (especially people like you) to be confused and begin to think that it was only the militia that would be allowed to keep and bear arms. Your inability to read 18th century writing in the context in which it was written doesn't change the entire purpose of the constitution into a regulatory document that limits your freedoms. It's exactly the opposite.
So, go ahead: cite a single piece of correspondence, a single page from the federalist papers, ANYTHING that begins to support your inability to parse the language. You won't even bother to try, because you know you're just making stuff up in hopes that someone else reading your posts will think the constitution is a freedom limiting, rather than a freedom protecting document. You're just pretending that you don't understand that the constitution leaves it up to the states to pass legislation that sets forth criminal penalties for things like murder. Why you want to look so dumb is a bit of a mystery.
So, fire away. Let's see something other than your backwards assertions. You claim to know the founders' intent, but you cannot trouble yourself to actually cite a single passage from any of them that backs up what you say. Go for it. Show that you're not a liar by doing something other than stamping your feet.
all of the lies about the benefits are guns are outweighed by the obvious facts of the hell of too many easy guns
So you're saying the FBI is lying now? Please show your evidence - not just you having another fit - that indicated where, precisely, they are incorrect in their reporting. No? You don't have any, do you?
Tens of thousands of people are killed using knives, pipes, and cars, etc. Have you just not got around to finding a way to re-interpret the constitution to claim the founders wanted people to be well trained in their use? You keep dodging that question. Why? Because you know you're deliberately trying to mislead on this topic.
OK! Ready for your links to historical writings. Go.
If you want, you can start by finding some opposition to the people who wrote the huge body of documents surrounding the forming and adoption of the amendments.
Here's a typical example, from Remarks on the First Part of the Amendments to the Federal Constitution from 1789: "Whereas civil-rulers, not having their duty to the people duly before them, may attempt to tyrannize, and as military forces, which must be occasionally raised to defend our country, might pervert their power to the injury of their fellow citizens, the people are confirmed by the article in their right to keep and bear their private arms." Case in point. They're talking about the amendment preserving the individual right to keep and bear arms, privately, specifically because there will also be a government-armed/trained militia/army. You are deliberately flipping their intent upside down in an attempt to reinvent the constitution to suit your tastes.
How about Samuel Adams, clarifying things for you, in 1788: "And that the said Constitution be never construed to authorize Congress to infringe the just liberty of the press, or the rights of conscience; or to prevent the people of the United States, who are peaceable citizens, from keeping their own arms; or to raise standing armies, unless necessary for the defense of the United States, or of some one or more of them; or to prevent the people from petitioning, in a peaceable and orderly manner, the federal legislature, for a redress of grievances; or to subject the people to unreasonable searches and seizures of their persons, papers or possessions." That sums up the first round of amendments nicely, and makes it plainly clear (to everyone but you, because you're trying to wish it away, and assume that they wrote just one of those amendments as a regulation requiring limits rather than protecting liberty) that ALL of those amendments are intended to LIMIT THE GOVERNMENT'S POWER. To prevent the government from infringing on things like freedom of speech, freedom to keep their own arms, assembly, etc.
You're probably thinking of some other founders, right? You wouldn't want to involve people like Jefferson, probably, because it would ruin your narrative? Jefferson loved to quote Beccaria, incuding this one: "False is the idea of utility that sacrifices a thousand real advantages for one imaginary or trifling inconvenience; that would take fire from men because it burns, and water because one may drown in it; that has no remedy for evils, except destruction. Laws that forbid the carrying of arms laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes. Such laws make things worse for the assaulted and better for the assailants; they act rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man."
I'll look forward to you citing a specific example of the second amendment being described by any of the people who wrote and implemented all of those contemporary amendments, as protecting a right that was in ANY way conditional on passing some sort of government test of skill. You seem certain that intent exists: put up, or shut up. Show the thinking that defines the founders' concepts of a skill test for individual gun ownership, something that they repeatedly say shall not be infringed.