I’ll take you at your word that it wasn’t what you intended to convey. The fact remains it is what you actually said, not once but twice. Again, I’ll take you at your word that this wasn’t what you intended to convey, but it is what the phrasing you used said. A fifth column is an organization working for the enemy to destroy a government/military from within. At the behest of the enemy, to deliver it to said enemy. A psyop is nothing more than the shortened ‘milform’ of psychological operation. You said:

in 2008, is it possible that MAGA is a fifth column? To me it seems like there is a great deal of evidence, albeit much of it circumstantial, that it is possible, maybe even likely, that MAGA is one of the greatest psyops in history.
MAGA is neither a fifth column, nor is it a psyop of Russia. It is a homegrown, entirely Native American (in the sense of the Know Nothing Party) phenomenon. It was not created at the direction of the Kremlin, nor is it working with the Kremlin entirely for the Kremlin’s interests. That it shares interests with Russia, and that Western MAGA and MAGA-esque ‘influencers’ have long had a hard on for Russia, and that it has come to light that some of these influencers were being paid by RT doesn’t make it a creation of Russia.

Of course every nation and group tries to do this, but if MAGA is a fifth column motivated purely by self-interest, then Russian can wield them as a scalpel to great effect (thus making it potentially the greatest, or maybe most effective, psyops in history).
That’s the thing though. Fifth columns don’t act in their own self-interest. They don’t have self-interests. They act in the interest of something hostile to the government they are working against.
Fifth column Definition & Meaning - Merriam-Webster
: a group of secret sympathizers or supporters of an enemy that engage in espionage or sabotage within defense lines or national borders
FIFTH-COLUMNIST | English meaning - Cambridge Dictionary
a member of a group of people who support the enemies of the country they live in and secretly help them:
Fifth column | Definition & Facts | Britannica
fifth column, clandestine group or faction of subversive agents who attempt to undermine a nation’s solidarity by any means at their disposal. The term is conventionally credited to Emilio Mola Vidal, a Nationalist general during the Spanish Civil War (1936–39). As four of his army columns moved on Madrid, the general referred to his militant supporters within the capital as his “fifth column,” intent on undermining the loyalist government from within.
A cardinal technique of the fifth column is the infiltration of sympathizers into the entire fabric of the nation under attack and, particularly, into positions of policy decision and national defense. From such key posts, fifth-column activists exploit the fears of a people by spreading rumours and misinformation, as well as by employing the more standard techniques of espionage and sabotage.