instead of us killing each other

Um what. Where in the history textbook did you read this part about humanity not killing each other?

The entire course of human civilization has been about humans killing each other, sects killing each other, kingdoms and nations killing each other.

The only reason we've enjoyed relative peace for the last 80 years (and I understand how much weight that "relative" is pulling) is because of the rules-based-order that emerged as a result of human societies utilizing governments as a medium through which to engage in diplomacy. Which, in case you missed it, largely occurred due to each respective nation-state engaging due to self-interest.

So no, we're not some essentially altruistic species that only survived to procreate and evolve due to our perfect selflessness. Humans are primarily egocentric, and as individuals develop they expand their "sense of self" to larger in-groups: to their family, to their neighborhood, to their schoolmates, to their subcultures, to their geographical region, to their nation, and if they don't stop there, the enlightened cosmopolitans among us might expand our sense of identity to humanity as a whole, or to the entire planet, or to all sentient life throughout the universe. But that is far from the default state of humanity, and the relative few who reach that level of collective awareness are a very small minority indeed. And most people who stop short of reaching that level of consciousness only end up killing whoever is left outside of their personal "in-group" anyway, no matter how small or large that in-group becomes.

The altruistic few are mostly even regarded with suspicion by their peers and estranged from society, because most people simply don't trust the intentions of someone claiming to have a selfless motivation.

Resting the fate of society as a whole on the good will and inclinations of the average member of it is a terrible idea, especially when billionaire oligarchs are already being allowed to basically live anarchistically, and they show you every single day what they're deciding to do with that. I'll give you a hint, it's not altruism.

So no, you're wrong, and telling me to stop contributing to the discussion is not going to change that. Seriously, what kind of anarchist tries to win a discussion by bullying into silence anyone who shares a conflicting opinion? 👀 Hmmm...