In October of 1837 Missouri Governor Boggs issued "(Executive) Order 44" (aka "The Mormon Extermination Order") to criminalize, expel or exterminate the Mormons in the western part of the state of Missouri. From the Order: "...the Mormons (are) in an attitude of an open and avowed defiance of the laws, and of having made war upon the people of this state.....The Mormons must be treated as enemies, and must be exterminated or driven from the state if necessary for the public peace....(The) orders are, therefore, to hasten (this) operation with all possible speed...." L.W. Boggs, Commander-in-Chief (Governor).

The Mormon leaders surrenders on Nov 1st but the EO was used to continue to dignify the forced removal of the Mormons by unauthorized informal militia. The Mormons were rounded up on short notice and expelled from their homes and forced to abandon their private property (save what they could carry with them through the snow) and forced to exodus across Missouri into the contiguous state of Illinois.

The Mormons took a stand against the persecution that preceded Order 44 and rather than serving to ease tensions it actually heightened them for creating fear in the western parts of the state. In the summer before the Order Mormon leader Sidney Rigdon while not intending to attack his neightbors made the following statement:
"We take God and his...angels to witness..., that we warn all men in the name of Jesus Christ, to come on us no more forever. For from this hour, we will bear it no more, our rights shall no more be trampled on with impunity. the man or...men, who attempts it, does (so) at the expense of their lives....." SR July 4th, 1838

FWIW, this Unconstitutional Order was not rescinded until 1976 by then Governor Kit Bond.

Now given the attempt by The Department of Homeland Security (DHS) to demonize patriotic Americans (supporters of the Constitution), Gun Owners and Military Veterans (who are sworn to protect the Constitution and are trained in arms and tactics) could the precedent, albeit Unconstitutional, of Missouri Executive Order # 44 be a template to criminalize supporters of the Second Amendment who refuse to turn in firearms (subsequent to a confiscation order) and then to round them up (since they cant be merely moved from state to state under a federal order) and use deadly force (defacto "extermination") if they resist and do not peaceably comply?
Thoughts and Comments are welcome.

As Wrabbit says, Missouri history (and all history for that matter) is more complex than the history books usually record. I have deep roots in Missouri, BTW. I was a grown man before I learned (for instance) that Quantrill's raid on Lawrence, Kansas was bandied about as a propaganda tool to demonize one side. In fact, the raid on the town of Osceola by Kansans was worse, and is little known - it's the usual victor history. For PC purposes, the "Mormon Wars" are usually glossed over, and for that reason, the old Missouri EO will not be used as a precedent, but I'm sure they will find some excuse or other.

Lucky for those who believe in the fatasy that the goverment wants take thier guns, that they live in an America where such a thing could not happen again.

In a word, NO.......

You seem to be forgetting that the reason for the "Mormon" extermination order was about removing a group of people wholly, not just because they had guns. It was extermination of armed men, women, and children. Since it has been rescinded as being unconstitutional, the chance something similar using it as a template will surely fail.
Not that anyone would do this anyway. The right to bear arms is entrenched in the USA people. No one will take away your guns. Even the stupid ones, like assault weapons.
So be safe, put the safety on and lock it away like it should be.