For example, someone might believe in flexible working, but judge people who work from home as being ‘lazy’.
Sometimes, people will act out and blame others or become aggressive when cognitive dissonance occurs, especially if that person somehow played a role in challenging their belief (even just by virtue of living their own life according to their own values).
Beliefs don’t always stem from evidence; they often come from a need to believe, which means people hold a lot of assumptions (beliefs without evidence).
Rather than challenging their own beliefs with evidence (which can be difficult and confronting), some people take it out on someone else. For example, believing you are smart, but failing a test might result in you blaming the teacher.