If the original Boston Tea Party (c. 1773) was against Taxation Without Representation, ....?

Why did a group of the most OVER-REPRESENTED minority in the history of all world governments with negligible exceptions all the way back to the Roman Times....(Middle Aged Conservative White Middle Cl Christian Men ) adopt the name? Who convinced you people that any more than 19% of the Government, rightfully belongs to you, if you are in fact true Republicans who believe in a representational government?