1) The British took several steps between 1763-1774 that alienated its American colonies. The biggest steps taken were the taxes implemented by the British parliament. Laws like the Stamp Act, Townshend Act, and the Tea Act were all laws passed without the colonists consent.
2) Britain felt justified in passing these laws and taxes without the colonists consent because they felt that the reason their government was in debt was due to protecting America during the French and Indian War. From 1754-1763, the British sent soldiers, ammunition, and other resources to North America to help the colonists fight the French. This war caused the British government to go into debt, so they turned to the Americans for assistance since they just protected them from the French.
3) The colonists rebelled against the taxes and laws. They boycotted British goods, attacked tax collectors, and protested until the laws were repealed.
4) The colonists stated that the laws and taxes implemented by the British parliament were unfair because they were passed without their consent. This is the first time that the colonists were taxed by someone other than their colonial legislature. This prompted the rallying cry of "no taxation without representation."