Francis is feeling deeply upset over Tom Erskine's death, but he doesn't express his emotions openly. Instead of showing his sorrow directly, he tends to act out negatively, making others' lives difficult. His behavior might seem rude or unkind, but it stems from his internal turmoil.
It's important to try and understand his perspective and overlook any rudeness, recognizing that his actions are a result of his emotional distress. His silent suffering leads him to lash out in ways that are not meant to offend, but rather reflect his inner struggles.