After the French and Indian War and Proclamation of 1763 Great Britain introduces new laws and taxation systems that affected every citizen of colonies. People felt betrayed, because they believed that they are equal member of the whole country.
Explanation:
After the French and Indian War British government introduced many new taxes. The first one was the Stamp act from 1765. Then after the Boston massacre and Boston Tea Party we had Intolerable Acts, which were probably the heaviest measures introduced in the 13 British colonies in America. It was obvious that some type of revolt will happen.
At the time, most rulers were Catholic and believed that the Pope had influence over all of them. And to top all of that, Roman Catholicism was the only Christian religion at the time.