The right also organizes humans into us-vs-them: the natives versus the immigrants, the faithful versus the infidels, and so on. Whether those make sense depends only on the values, way of living or material conditions you want to protect and whether the other group is a menace to them.
If we don't band together to help one another, we're stuck playing by the rigged existing rules of the game. Organizing (either in the traditional labor sense, or via super PACs and racism) allows us to change the rules in our own favor, because we can wield more power.
With that laid out, what kind of group should we organize? The bigger the group, the more power it has. But also: the more coherent and lockstep the group is in its actions, the more power it has, at any size. So the goal of all politics is to form the biggest coalition you can that still holds together.
Many socialists think, as a strategic question (not one of ideology), that the goal should be to organize the whole working class (everyone who must sell their labor in order to survive). This is the biggest group you can possibly have that still shares a common interest. The problem is obviously that this is an unwieldy group and it's really really hard to do, particularly in the face of almost infinite money trying to stop us. There are various thoughts on how to address this problem, the classic one being to organize whole shops or industries at once, and slowly building momentum that was, but fundamentally it is about putting together the biggest possible political grouping that coheres.
Right wingers have a different strategy, which is to use identity politics (racism, xenophobia, sectarianism, sectionalism, etc.) to organize a smaller coalition but in a very tight, coordinated way. The play is that a relatively small group of committed actors can use things like propaganda, violence, and dirty tricks to seize or maintain power.
Fundamentally the left and the right are trying to do the same thing, which is to put together a coalition that let's them change the status quo. If we protect our individuality too much, we get rolled by the other side. Establishment oriented people tend to miss this.
100 years from now, your birth date and death date, and the life lived in between, will be no different than any other human, lines on a headstone or rows in a database. Maybe you’ll have a Wikipedia page, for the historical ledger, but if not, nothing changes.
But I have to argue with you about one thing: Everyone is special.
There is a vast darkness, eons of empty space around us, and no other known life in the universe.
Every lizard is special. Every crab and spider and snail is special. Every person is especially special.
Your attitude about that is, let's say, demented as a result of hating your own species and your inability to love yourself or the people around you, or even the people you hate.
You just proved we are all special.
Surely there can be no counterargument to your final analysis of the pointlessness, the end of life.
I'd posit something different that you might sleep on: That your existence is worthwhile and, in fact, unique once and only once in all the history of the universe. That your ability to observe phenomena actually solidifies and collapses indeterminate waveforms. That you're living in the one and only terrarium that we know of, and belong to the most intelligent species that we know of, and that you therefore:
Have an obligation to the universe be worth more than what you're saying you believe in the prior statement. Of course, you can be whatever you want to be, and if that's merely believing that the smartest-sounding thing to say in a chat forum is that we're all meaningless and that the earth will be swallowed by the sun in a few billion years, then have at it; you're no doubt still a credit to your species for realizing things like that. Dogs, for instance, have no idea. But still, it's very disappointing. I mean, you have a vast number of upvotes on HN. Surely you must have something more interesting to impart about Life, the Universe and Everything? Even if it's just about fish?