What was patrick henry's main reason for believing great britain had right to tax the colonies

The Colonies benefited from Imperialism and the protection that GB gave with the protection against Indigenous peoples and the French. This costed a lot of money and resources to make, thus taxes were necessary because after the 7 years way, the GB bank was basically bankrupt and into a lot of debt. 

Independent executive agencies are more specialised.

The second , larger puritan colony of massachusetts bay was conceived as a "city upon a hill". but it also struggled with internal turmoil like the salem witch trials and external conflicts like king philip's (metacom's) war.