""The horrors of German Fascism were unknown at the time.""
Yes, many powerful folks "flirted" with those who eventually turned out to be facists, such as in Britain.

Mr. Peron seems to have established a fascination with Mussolin in the early days when he was posted to Italy. Argentina seemed to remain relatively neutral in early WW2, benefiting financially from trade with all sides (possibly a bit like the US of A). There is significant conjecture where his war sympathies resided, as well as what level of post-war cooperation existed with escaping german leaders. But, this also exists with some neighbor countries. Like many nations, Argentina had an early migration-in of people from Germany.

Long after Eva's death, after long exile, Peron returned and obtained some power (to some degree based on the popularity Eva garnered many years before) -but, there is uncertainity if he was actually lucid, (or, if he ever was totally so) as others seemed to be calling the governing shots. It was during this period that the CIA seemed to have cold-war interest in the Peron government, as the "dirty war" blossomed. The CIA was established in 1947- a year after Peron first took power.