Is very simple, although the term "chaser" may not be as commonly used as it was when John Collier wrote his story. A chaser is a drink that is taken to follow the first alcoholic drink.
In the text it says, "She taught me my scales and exercises, too, on the little parlor organ", "I struggled with the 'Harmonious Blacksmith'", and "<span>I had been doggedly beating out some easy passages from an old score of 'Euryanthe'". The boy mostly practiced scales and exercises, but he also played "Harmonius Blacksmith" and "Euryanthe".</span>
Answer:
He thought the Soviet Union "runs against the tide of history by denying human freedom and human dignity to its citizens," and that unlike the Societ Union, America always used its power for good, not evil