I don't know how to answer that, as there is no international body of Fascists who certifies that you are one. Is it a historical fact that Jimmy Carter is a traitor? I would say yes, he would say no, but I know of no way to say that he is as "historical fact".
Were his ways different then the Conservative ideals we hold now??? most certainly... but do the acts that he did as president really constitute the title fascist???
Folks forget the mindset of the time when he was president is much different then now...
I just think it rather flippant and misguide to call him a fascist.