What is the "current fashion of greeting old friends" in "Civil Peace"?

What words or phrases you to recognize the historical context of the line 7

Chan was leading a group discussion in his university. he discovered that a few participants were dominating the discussion and not letting others speak. what should chan do in such a situation a. chan should allow participants to speak until they are finished b. chan should adjourn the discussion and recommence at a later point c. chan should bar the dominant participants have the freedom to share their opinion d. chan should ensure that all participants have the freedom to share their opinion e. chan should restructure the group so that the dominant participants are isolated

What does twain find ironic and hypocritical about human patriotism?