The expressive language actually makes his point clearer. An inexpressive comment is when someone makes short insults and doesn't explain themselves. He explain

The expressive language actually makes his point clearer. An inexpressive comment is when someone makes short insults and doesn't explain themselves. He explained himself in detail. Good English communicates the ideas and feelings of the writer, which he did with aplomb! Since he is a primary source for his particular polemic, his rhetoric is a valuable contribution to the discussion.