"Another way is to recognize that having and venturing opinions are an affirmation of kinship; there is always a certain amount of risk involved but each of us is also offering the essence of oneself. "

There is a lot of truth in that. It can be an affirmation of kinship, but it is also a great way to build walls. Sometimes that is the reason for venturing opinions.

Look at the posts here. Sherlock seems to know all the facts, at least the ones he or she chooses to recognize, and takes comfort in sharing them. It sets him or her appart and then can join with others who feel similar. It doesn't make them right, but they find solace in others who walk a different path.

Hate groups tend to do the same.