There's clubs for everything. I'm naturally interested in politics and I developed my individual political beliefs - Because of that, I want to associate myself with people who think alike. You are criticizing clubs and tribalism while you're posting on an internet forum for atheists (a small example of clubs and tribes)
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you