Why were the colonists upset with the new taxes that great britain passed prior to the american revolution?

The colonist were upset with this because they were taxed quite heavily. To them the taxes they received was to high and demanding, and just unfair. There was first, the Navigation Acts. This act declared that colonial exports had to be transported by English ships. There was also the Townshend Act. This taxed a number of British goods. Because of this act, it lead to the dumping of tea at the Boston Harbor.

Their monotheistic belief in greek gods.