Give me a break. I worked for Amnesty International for 20 years, during which time I found it easy to get both democrats and republicans to denounce human rights arises in the Soviet empire or in other communist countries, whether it was Eastern Europe or Cambodia, whether the case was of an individual political prisoner I was working on, or a government campaign of terror. But when it came to denouncing right wing abuses in this hemisphere, it was a heavier lift for the GOP. Even political prisoners from the eastern bloc acknowledged the abuses in this hemisphere. One could posit that democratic politicians I approached, accused for decades of leaning pinko, jumped at the chance to denounce communist abuse. Republicans, on the other hand, could be said to fear being called soft on communism, but still might jump to denounce an abuse in a right wing country. There might even be variations with republicans more willing to denounce death squads in Guatemala than in El Salvador, since the US was supplying military aid to the latter. Most on both sides were sincere, however.
One example stands out. A Salvadoran living in LA called me about what advice I should give to his brother, who witnessed an abduction of some suspected leftist who was no doubt tortured, killed and had his body dumped some where. The brother was seen by the police, and though they knew who he was. Should they flee to join him? I told him that in my position I couldn't offer such advice, but I contacted the office of the Republican Senator in California at the time. This was when Reagan was saying that there was nothing to fear for Salvadorans, and was denying 97% of their asylum claims. The senator's staff put me in touch with a staffer at the US Embassy in San Salvador. This was a guy working for the GOP, appointed by Reagan. His thoughts: "I don't care any more, I'm leaving in three weeks. He's a dead man. Tell him to get out of the country." Reagan's own people knew what he said was BS. Fortunately, things got a bit better after Bush one came to office.
As to democrats and fascism, you must have forgotten the McCarthy era. One joke that liberals told one another was that they were "premature anti-fascists," that is, they opposed Hitler before Pearl Harbor. They therefore came under suspicion. Your division is pretty simplistic.
Btw, nice try making Trump and Reagan closet democrats. You suggest that there most be something in the democrats genetic makeup that has them support tyranny, and that the gene secreted something to cloud their judgement, even after they switch parties, making them support dictators. As I stated, some on the left have been credibly accused of ignoring abuses in leftist countries, just as some on the right are credibly accused of ignoring abuses in right wing countries. I believe that it may have been Tolstoi who said something like that the difference between oppression from the left and oppression from the right is like the difference between horse shit and dog shit.