The perspective on if-and-which-infinity is really a matter of philosophy, not mathematics. I suspect your qualifications on that front far exceed mine. The problem is that Doronshadmi takes his (philosophic) view on infinity as a basis to (selectively) reject basic mathematics.
Yes. Philosophy. As I saw it from the start over ten years ago he was setting out to deliver a new underpinning for Mathematics or what might be called a Meta-Mathematics. There was also the element of an Absolute Unity as the Fundamental Source that one could come to get a sense of through Transcendental Meditation. Doron sees this as integral to his "Organic Mathematics" (or whatever name he's giving it now). This is why this thread was begun in the Philosophy/Religion section.
I did take a Philosophy series in College, but I'm no maven in philosophical discourse. I also took Set Theory and Logic.
You give Doron more credit than I. His fundamental point is that points cannot gather in sufficient quantities to every become a line segment. It was a fair observation at one time in mathematics history, but we are for the most part beyond that now. Philosophy may do with it what it will, and I have no objection there.
Doron, on the other hand, wants it damn much of mathematics. He seems to be hung on "process": add a point, still not enough; add another.... This was confirmed with his misinterpretation of the Axiom of Infinity. The axiom asserts the existence of a particular infinity set (absolute infinity, by the way), but Doron insists it asserts a process for constructing a set ever increasing in size (more at potential infinity).
If Doron has an "Axiom of Infinity," it's not the same at all as modern Mathematics. His axiom is pretty much that actual Infinity is an Absolute that cannot be contained or bounded in any sense. He allows a "potential infinity," but this is just a convenient fiction at most.
He relies more on the visual-intuitive pole than an abstract notion of an infinity that can be manipulated by thought. No! No! thought cannot reach it. All concepts are only through how the visual and symbolic interplay with each other.
As for his "represented as", Doron's views can be perfectly explained with words, as I think you have done reasonably well. Doron, however, needs more because he has lashed out from his philosophic fixation into established math. He has invented a shield he thinks protects him from all criticism via this visual-spatial vs. verbal-symbol reasoning ruse. The graphic of six underbars he included -- serving no purpose other than to "name" his object -- was a device to slip in an unnecessary visual element he could later exploit in his "you can't get it" mantra.
By the way. I am amused that ______ when rendered using Lucinda Sans Unicode for the font, ______, it clearly shows as six separable elements. Not quite the visual-spatial reasoning conclusion Doron wanted, but nonetheless valid.
Absolutely!!!
The other very important thing to understand here is that Doron is not doing Set Theory. He speaks of "collections" but these must not be understood as sets. He uses mathematical notations used in set theory and logic, and this gives rise to misunderstandings, because his readers can't but read into him notions based on the standard usages of those terms and notations. One has to temporarily suspend whatever else to just get a clue at his direction.
Now I'm afraid he may reply that he is doing his own Set Theory and assert something that looks to be a standard statement in Set Theory. This kind of thing threw me before when I thought I was on the right trail. Finally I got the lay of his land outside of his "Mathematical" presentation during a discussion about the relationship between the Absolute and the Contingent. Philosophy, you see.
So far he's presented this meta-mathematical framework as a foundation of sorts. It leads to a very different way of thinking, not in the manipulation of categories, but on a, for want of a better way of putting it in this moment, in matrices of "Yin" and "Yang." His mind is geard more that way as a kind of visual grasping of charts, while we proceed step by step in a liner fashion not seeing what he considers the organic structure of parts contained in wholes that are parts contained in greater wholes. OK too much. I promise I'll get back to this "organic" thing later. Point to be taken. He's not thinking the way we are accustomed. I find that fascinating and wonder where that flavor of thinking could go.

