I believe:
- His goal is to be a loyal revolutionary.
"...I felt a certain responsibility"
- His opponent is the new customer.
"And with the enemy in my house..."
- He feels torn between hurting and serving.
"I went on lathering his face. My hands began to tremble again." (literally serving while getting hurt)
Answer:
His goal is to do his job well.
His goal is to be a loyal revolutionary.
His opponent is the new customer
He feels torn between hurting and serving.