@ununseti
I don't remember now who said this, but I think this applies: You are not your opinions. Think of your opinions as things you carry around with you. You can drop opinions and pick up new ones and still be you. When you make your opinions part of your identity, it's easy to become offended when someone disagrees with you, especially if they make good points. I think that's often where the kind of exchange you describe comes from: people making their opinions part of how they envision themselves.
Oh, that's a nice reductionism.
Not like I don't agree. It is one of today's problems. Yet this kind of sentence, that makes it like a DIY one-book upset me.
Yes, our hyperactive egos now identify themselves with what we think, consume, etc, (and what we don't think and consume etc., which is partially the reason why we must not only follow these patterns but to actively show them), but not without a basis. One hundred, or two hundred years ago, believing in something was acceptable. There were masters, a "correct" way of life and there was a kind of predictability to life.
And that's just not true anymore. We're in a fucking spiral of continuing vices, life choices, lights, entertainments and world views and the truth is we are not conditioned to them anymore, we can choose any. And once you're conscious of that, it is easy to realize that in the end you must become a judge of what surrounds you, because now believing in something is not enough: you're by yourself, and without limits.
Today, opinions can shape our lives, so saying we won't change ourselves by altering them is a mistake.