The Supreme Court disagrees with you. No predicate (or in this case, prefatory clause) could undermine or limit an operative clause that straightforward, at mos

The Supreme Court disagrees with you. No predicate (or in this case, prefatory clause) could undermine or limit an operative clause that straightforward, at most it could be considered a motivation: i.e. the right of the people to keep and bear arms is intended to (at least, but not solely) give those people the ability to keep and bear arms sufficient to feasibly form an armed militia.