Explain how the colonists organized against the stamp act and why it was eventually repealed?

The most famous popular resistance took place in Boston, where opponents of the Stamp Act, calling themselves the Sons of Liberty, enlisted the rabble of Boston in opposition to the new law. This mob paraded through the streets with an effigy of Andrew Oliver, Boston's stamp distributor, which they hanged from the Liberty Tree and beheaded before ransacking Oliver's home. Oliver agreed to resign his commission as stamp distributor.

Determined colonial resistance made it impossible for the British government to bring the Stamp Act into effect. In 1766, Parliament repealed it.