If these particular Islamic extremists were determined to sacrifice their own lives to stop other Islamic extremists from practicing Jihad against other Americans, would that still apply?
Does this mean that under no circumstances would you ever strap a bomb to your body and blow yourself up to protect your family and loved ones from Islamic extremists?
If there is an Islamic extremist who is a member of "the people" is he nonetheless to be denied all of his right to keep and bear arms? How about Catholic extremists? Democrat extremists? New England Patriot extremists?
Will there be a simple test to determine who is not protected or will there be a sizeable rule book? Who gets to write such a book?
The constitution is useless if you interpret in such a way as to destroy the country it is meant to govern.