I tend to agree with you, but based on the way you have worded this, I am curious if you think that people have conscious awareness (which is required to form intent) of this?
And as a follow-up: if this phenomenon is sub perceptual, might that change how one might go about addressing it, or even discussing it (it is a fairly common point raised in these sorts of discussions)?
Some people will be self aware, and not take arguments or positions too seriously - their own or others - they know they hold the points of view for group membership - they tend to not to like to debate them, aware of the futility.
More common though is ego-defense/group-defense reaction. This is the zealot. Both a person's ego (you're wrong) and their group (your group is wrong) is on the line. This is in addition to losing their membership of a group if they adopt a different position.
https://snort.socialhttps://iris.to
It seems to work a little differently to other clients by aggregating all the content on one relay first before sending it to the client, but I prefer this as it is faster and uses less bandwidth.