"I have read and read many a document to my head hurts and I see nothing there that says The Federal government has the right or obligation to suppress any rebellion"

Within the Constitution itself are provisions regarding rebellion or insurrection. For instance:

Article 1, Section 8. "The Congress shall have Power To . . . provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions."

Article 1, Section 9. "The Privilege of the Writ of Habeas Corpus shall not be suspended, unless when in Cases of Rebellion or Invasion the public Safety may require it."

This seems to establish at least a right. The obligation to suppress a rebellion against federal authority may be deemed inherent, especially considering Article 6:

"This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land."