It's all in the head.

Peace and blessings.
For years, I have been troubled by the thought that if I had been born into a society that saw Judaism as nothing more than a figment of an overdeveloped and delusional imagination, this is probably the view I had of the entire system of beliefs that exists in me today, while in the totality of thought in which I find at this moment nonsense that only brings destruction and ruin to the world, I would have recognized justice and fairness.
In fact, from this I would like to conclude that what I feel identification and agreement with the view that people from the society into which I was born offer (my sages/rabbis) is not because I have the ability to identify the absolute truth of our world (or something of it) and in the things they say I find it, but rather it is only because their words fit the patterns that are drawn within me, shaped by countless events and scenarios from my life within this society.
Each individual perceives the world in the way that the society into which he was born perceives him (something caused by what is called indoctrination), and even when he investigates other methods, he truly and sincerely recognizes them as incorrect. But not because they are indeed incorrect, but because he is simply shaped differently. (Narratives)
This is tangible reality. This is what exists seemingly "objectively."
A constant, life-long process of instilling beliefs and shaping ways of thinking is an integral part of the life of every human society on earth.
And so what value is there in the sense of certainty (even if it is not absolute – since the Rabbi rightly claims that there is no justification for such certainty) that we feel in the way of our habitat? Accordingly, what value is there in the identification that I feel with our Mishnah, which will certainly be accepted by my mind and fit my train of thought. Of course, I will think that we are right. But that is all in my head, actually.
I find myself constantly asking in other people's imaginations whether they are not troubled by the indisputable fact that they too, just like that extreme leftist who undermines the existence of the State of Israel as a Jewish state, and like that Palestinian who is rioting on the fence at this very moment and sees our country as the axis of evil in the world that is occupying and robbing an entire people of its national freedom and land – are they not troubled by the fact that they too, just like them, are adopting a way of thinking and a worldview that their home dictated to them?
Every time I feel like I agree with certain content that comes from our culture, I feel frustrated and tell myself that it's just an illusion, what I recognize as truth. (Even if it's not certain, but even plausible at all)
How does the rabbi deal with this point?