If it was not for the "MAGA" country bit, there would be no controversy.
You have a bunch of right wing ideologuts who don't want to admit one of their own could do something like this. That is it in a nutshell.
It's peddling a conspiracy theory under the guise of critical thinking.
And why do I think a lot of "this was fake" talking points are coming off of right wing websites?
Until or unless there is evidence for something else, this seems the likeliest explanation to me.