Your first paragraph doesn’t really make sense as those on the left tend to be the most keenly aware of the dangers of fascism, since
a) First they came for LGBTQ+ people (which was left out of the poem since it was written by a conservative priest who was fine with persecution of THEM) and then they came for us
b) it’s always us that end up having to fight fascists alone since the liberals try to negotiate with them (or stay out of it at first and then join them like they did in Italy with Mussolini) and the others on the far right try to become their allies
Unless you consider Neoliberals left leaning. In which case you’re MORE wrong, but your logic is more consistent.