1. All men are created equal and endowed by God with unalienable rights; 2. governments are instituted to secure these rights; 3. the only just authority of any government is the consent of the governed; 4. when any form of government becomes destructive of these ends (protecting rights and governing only by consent), people have a right to alter or abolish it.
The third paragraph states that it is prudent not to change governments for light or frivolous reasons, but when a long train of abuses and usurpations show a clear design to reduce people to despotism, " . . . it is their right, it is their duty, to throw off such a government."
When you understand this, then it becomes crystal clear why the right of private citizens to keep and bear arms is included in the Bill of Rights. A just government, securing the people's rights and acting with their consent, has no need to fear an armed citizenry. James Madison, in refuting a European friend's pessimistic view of America, boasted, "unlike your governments, we are not afraid for our citizens to have arms."
Hey those founding fathers were smart, almost like they could see into the future to know that some day we may need to clean house from all the infiltration. Those guys studied historical infiltration that went on in countries in europe and decided to give us independent power of authority.
So let it be known to all that engage in the willful destruction of women and children, that we men will root you out no matter what your station and remove you from the earth as an honorable duty!