You don't understand it at all. Ypu're simply reduced to your usual, silly conspiracy theories.
The majority analyzed the Second Amendment’s two clauses and concluded that the prefatory clause announces the Amendment’s purpose.
10 Furthermore, although there must be some link between the stated purpose in the prefatory clause and the command in the operative clause, the Court concluded that the prefatory clause does not limit . . . the scope of the operative clause.
11 Accordingly, the Court assessed the meaning of the Second Amendment’s two clauses.
Beginning with the operative clause, the Supreme Court first concluded that the phrase the right of the people, as used in the Bill of Rights, universally communicates an individual right, and thus the Second Amendment protects a right that is exercised individually and belongs to all Americans.
12 Next, the Court turned to the meaning of to keep and bear arms.
13 Arms, the Court asserted, has the same meaning now as it did during the eighteenth century: any thing that a man wears for his defence, or takes into his hands, or use in wrath to cast at or strike another, including weapons not specifically designed for military use.
14 The Court then turned to the full phrase keep and bear arms. To keep arms, as understood during the founding period, the Court maintained, was a common way of referring to possessing arms, for militiamen
and everyone else.
15 The Court further explained that bearing arms, during the founding period as well as currently, means to carry weapons for the purpose of confrontation; but even so, the Court added, the phrase does not connote[] participation in a structured military organization.
16 Taken together, the Court concluded that the Second Amendment guarantee the individual right to possess and carry weapons in case of confrontation.
17 The Court added that its textual analysis was supported by the Amendment’s historical background, which was relevant to its analysis because, the Court reasoned, the Second Amendment was widely understood to have codified a pre-existing individual right to keep and bear arms.
18
en.wikipedia.org
www.law.cornell.edu
