"they claimed "tribalism is inevitable"."
I am not sure if we are talking about the same discussion, but I think what they meant was that tribalism cannot be defeated by non-tribalism. This is factually true:
https://trueleft.createaforum.com/human-evolution/ethnotribalism-the-computer-simulation/It takes anti-tribalism (a.k.a. folkism) to defeat tribalism. But they deliberately ignored this even after I presented it to them.
"would you agree that we must also seek to define defeatism and highlight its contrast to positivity, in order to eschew the former attitude?"
Sure, as I was doing here:
https://trueleft.createaforum.com/questions-debates/question-about-rational-thinking/msg17674/#msg17674If I believe it is impossible, I will not work towards it.
If I believe it is inevitable, I will also not work towards it.
Only if I believe it is possible but not inevitable will I work towards it.
"would you agree that the "tribalism is inevitable" is a "red-pill" statement"
"Tribalism will always defeat non-tribalism" is a red-pill statement (strictly original Matrix sense) compared to "tribalism will be defeated by non-tribalism" since it is less delusional. "Tribalism in inevitable" is itself delusional, however, ignoring the possibility of folkism.
"since you yourself have referred to such cases as "red-pill junkies"?"
Red Pill junkies refer those who think that just because they have broken through the first level of delusion, they have already reached the truth. For example:
http://aryanism.net/blog/aryan-sanctuary/the-last-word-on-marxism/The most important thing to remember is that Hitler, who should indeed be remembered for his fight against Marxism, was fighting against the real Marxism as is accurately depicted by the above article, not what Red Pill junkies erroneously call “Marxism” today. It is precisely those useful idiots who imagine that Hitler was fighting against Red-Pill-hallucinatory ”Marxism” who necessarily presume that Hitler’s ideology was the same as neo-Nazism. On the other hand, it is those who understand that Hitler was fighting against the real Marxism who have an easier time beginning to understand authentic National Socialism.