Well first of all, I assume you are referring to the American Revolutionary War, and that wasn’t because of any form of racial issues.

The Seven Years War (which was a colossal defeat for France, eliminating them as a colonial contender in both North America and India) has been better known as the French and Indian War among North Americans, and was important for Americans too. The arrogance of the British in their total victory alienated their colonists and led to a rupture between the colonies and the mother country.

The costs on Americans following the Seven Years War weren't massive as sometimes claimed, but they were levied taxes on several goods that had previously been tax-free for the British colonists. The British were arrogant though, towards their subjects in the Thirteen Colonies, who were mostly of British stock.

The Crown believed they could start drawing money from their colonies and giving little back. The taxes weren't the big issue, the big issue was that the taxes gave the Thirteen Colonies little (if anything) in return.

Author and Harvard professor, Bernard Bailyn, argues in his book, "The Ideological Origins of the American Revolution", that one of the underlying causes of the American Revolution was a growing belief among colonists that the British government was secretly conspiring to create an autocratic government in which the King would have unlimited power.

Bailyn argues that when the colonists saw what they believed were signs of this conspiracy at work, it spurred them to rebel: “It was this – the overwhelming evidence, as they saw it, that they were faced with conspirators against liberty determined at all costs to gain ends which their worlds dissembled – that was signaled to the colonists after 1763, and it was this above all else that in the end propelled them into Revolution.”

After the French and Indian War ended, the British government issued the Royal Proclamation (1763), which forbade colonists from settling the land west of the Appalachian Divide. The proclamation also prohibited private citizens and colonial governments from buying land from natives or making agreements with them, stating that only the British empire could conduct these official relations. Furthermore, only licensed traders would be allowed to travel west or trade with the natives.

The proclamation was intended to prevent the outbreak of another costly war like the French and Indian war by preventing further expansion into the contested areas. it was also intended to keep the colonists near the coast. New settlements further inland would cost the government a lot of money in roads, protection, security and local governments. Since the British government was already in heavy debt due to the cost of the war, it couldn’t afford to invest in new settlements.

Limiting colonial expansion to the area east of the Appalachian divide meant the colonies would expand west only when the government was financially able to do so and would avoid anymore costly Indian wars in the process. Yet, the colonists ultimately saw the proclamation as an attempt by the British government to put its own needs and interests first instead of serving the interests of its people, as they believed governments should do.

In the late 1760s and early 1770s, the violent deaths of two young boys at the hands of British officials stoked fears that the British government was out to terrorize its citizens in an attempt to control them. The Boston Massacre took place on the night of 5 March, 1770, during which British troops shot and killed five protesters outside the State House on King Street in Boston.

The event erased any doubts that the troops were actually a standing army sent there to terrorize, intimidate and force the colonists into complying with the new laws. The acquittal of the soldiers the following autumn only strengthened these beliefs. It also didn’t help that in Boston, where the trial was held, there was a suspicion of judicial irregularities.

The "taxation without representation" was, perhaps, the straw that broke the camel's back, but it was a small part, the colonists had long believed that Great Britain wanted to revoke the autonomy and dismantle the colonial government of the Thirteen Colonies.