It's bad to show disrespect toward other people's beliefs.
Sarah is looking through her social media feed and notices that an acquaintance of hers believes in a popular conspiracy theory.
She wants to respond to the person who is expressing this belief.
Sarah responds respectfully, that she does not believe this theory, and she posts links that disprove the conspiracy.
Sarah responds to the post by indicating that the conspiracy theory is completely crazy, and so must be anyone who believes it to be true.
The person is still not convinced, but they feel respected and are much more inclined to keep an open mind about their beliefs.
The person is hurt and outraged by Sarah's response and their belief in the conspiracy is galvanized by the personal attack.