....then someone else will have it twisted by pinning into Nostradamus ???????

I tend to use the theory word as it applies in science. So I won’t use the theory word for these crackpots. There not even a hypothesis. Not even a good idea.

I haven't even seen this on the right wing blogsphere

Read this from Snopes. It covers the whole range of conspiracy theory tropes, including the plot to take our guns. The level of stupidity running loose in the world is truly disturbing.

[snopes.com]

Behold a Pale Horse - Chapter 12 "The Secret Government" Page 225....

Chapter twelve develops the central theories of Cooper's text and attempts, fairly unsuccessfully, to synthesize the topics of the preceding chapters. The chapter contains an assortment of materials including previously published papers and delivered speeches; these are interspersed with later authorial and editorial comments. Various typefaces are used as well as extensive capitalization, which is apparently intended to convey significant meaning. Overall, the chapter is confused and poorly structured; in these aspects, at least, it is consistent with the remainder of the text. Finally, Chapter twelve introduces Cooper's alien and UFO-based theories into the narrative structure.

"Between 1947 and 1952, sixteen alien spaceships, sixty-five alien bodies, and one live alien were recovered by the Federal government. This unprecedented series of events caused the United States Federal government to engage in the wholesale deception of the..."

Some false-flag theories appear to be real [wanttoknow.info] , but there needs to be evidence! Not everything that is possible is real.

I couldn't find a specific debunking of the gun part - but here is more info about the author -
" He claimed to have served in the United States Navy, the United States Air Force, and Naval Intelligence until his discharge in 1975;[6] however, public records only indicate a period of service in the Navy with a ratings code of E-5/Sergeant (Petty officer second class in the Navy), including a tour of duty in Vietnam with two service medals":
[rationalwiki.org]
[en.wikipedia.org]
[allthatsinteresting.com]

I believe it is from a book called Behold a Pale Horse. The author is Milton William Cooper, a big conspiracy theory writer.
[en.wikipedia.org]

Nothing has ever been said about doing away with the 2nd amendment, only that guns are regulated.

Cia lives on plots, come on nah!

It's just another conspiracy theory. There is absolutely NO proof of it's validity.

Nothing would surprise me. But I'm inclined to be skeptical.