Here's the thing:
The US Declaration of Independence, the Preamble, allows for the People to take back the Government for the People in the event the Government no longer represents the People, becomes Authoritarian, Abuses it's Authority, goes against the People, stuff like that, with the 2nd Amendment being a means for the People to do so.
This does not mean that People can do this, just because someone Lost an Election, especially if that Person claims it was Stolen, without any Proof, just because that Person wants to stay in, and be a Dictator.
However, with how our Country is, I have no doubt this will have to be done, eventually. With Companies pouring Money into Elections, with Officials staying in Office for far longer than they should, just to benefit them, and make sure they stay in Office somehow, even though they go against what the People want (example: The People, most of the People, want to expand Social Security, and Medicare, but Republicans want to scrap it, along with VA Benefits, against what the People want, and are willing to hold the Country hostage, apparently to do it). Along with Churches trying to push Religious Views/Beliefs, which is against the 1st Amendment (Congress make no law respecting an establishment of religion - which also means no forcing Religious Views or Beliefs, such as being against Abortion, or against P*** (yeah, they want to Ban it), and even the far Right wanting to ditch the Seperation of Church and State, claiming Gov should not tell Religion what to do, but rather Religion should tell Gov what to do). Also, again, the Preamble of the DoI, the 2nd Amendment being a means for the People to do this when/if needed, and yet there are those who want to Ban Weapons, Gun Control like crazy, and even those wanting to get rid of the 2A. Basically a means of trying to limit the People's ability to fight back if the Gov ever decides to say the hell with the People, and start stripping People of our Rights even more, and try to force more control over the People.
But most importantly, if you were the Government, how would you want to make sure the People would want to get rid of Weapons???? You would make sure incidents happen, especially in certain areas. Then, when People no longer have means of Defending themselves, or the Country or being able to take it back, then you can do whatever you want to them. Or, by my other Theory, with how it has been established for Trump, if he started siding with Foreign Countries that are Hostile to our ways, then the People would not be able to fight back against them.