They ignore or do not know the meaning of the term "well regulated Militia". I doubt they know the difference between "keep" and "bear".
Except that it doesn't say "well regulated militia" junior. It says "the
right of the
people to keep and bear arms shall not be infringed". The right belongs to the people junior.
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"A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed."
.
.... The previous section was simply the why. And the
why (while important for sure in context), is largely irrelevant what it comes to the
what. And the what is that the people have the right to keep and bear arms.