Bostonians were angry at British troops, since the British passed laws violating colonial rights and troops rude act towards them.
Step-by-step explanation:
Whatever the laws passed in the British parliament reflected in the American Colonies. Boston located in New England was one of the British colonies where the tension between the colonists and British troops are constantly increased.
When the British parliament proceeded to rise the tax made Bostonians be angry at the British troops. So that people started boycotting and revolts against the British. Also, the British troops acted rudely to the colonists that in turn sparked into riots. Thus troops ended up killing the Bostonians.