Opinions are often based in emotion and group affiliation, linking them deeper to one’s worldview or identity.
As we develop our own identities, we use the broader narratives of the culture to which we want to remain a part of.
For example, even from young age when we first begin to construct our identities, we use the lessons from parents, siblings, peers and media to help inform who we want to be. And in today's culture, we have an arsenal of cultural stories at our disposal through the rise of social media. As we intertwine our beliefs with the groups to which we wish to belong (e.g., Liberal or Conservative, Catholic or Muslim) they become our convictions.