BOSTON – A rift is widening between Native American groups in New England over who has claim to scores of acres south of Boston where one tribe has been trying for years to build a $1 billion casino.The recently revived Mattakeeset Massachuset Tribe argues it’s the rightful heir to the land in Taunton set aside by the federal government for the Mashpee Wampanoag Tribe, which is planning to build a hotel, casino and entertainment complex.The Mattakeesets want the Mashpees and state and local authorities to recognize their land claim, which they base on colonial-era documents.“They blatantly fooled the whole entire country about this land belonging to them,” said Larry Fisher, who has been working to revive the tribe since becoming its chief.