What role did Private Hugh White and Edward Gerrish have in the Boston Massacre?

Monday, March 5, 1770, was a chilly day. Snow from a recent storm still lined the streets. That evening, Private Hugh White was stationed at a guard post on King Street. The post was near the Customs House, where British Officials collected duties. Some time after 8 pm a few young men approached White and began to taunt him.

The soldier grew angry and made a move that perhaps changed the course of history. White swung his heavy gun and dealt a blow to one of the youth, Edward Garrick on the side of the head. The crowd immediately saw this as the soldier’s attack on a “peaceful” civilian. The anger energized the mob. When the word spread on the streets the crowd started growing and continued to insult White. As more people gathered, White climbed the steps of the Customs House to stand above the crowd. He loaded the gun and said that he would fire if the crowd attacked. Instead the crowd started throwing chunks of ice at the soldier. Angry and frightened White called for help. Soon Captain Preston arrived with seven men to help White.

The events that unfolded minutes later became one of the biggest symbols of American Revolution. We can only speculate how the night would have turned out if White managed to stay in control and refrained from hitting Garrick or perhaps called for backup earlier. But his emotional state must also be taken in consideration. It is a well known fact that the British regulars in Boston were abused and mistreated not only by Bostonians but by their own officers.

the answer is both an appeal to ethos and logos (if that's what your question options were)