It's not my place to claim expertise, but speaking to the spirit of that article, I can't help but point out to myself that in Germany, you had an enormous level of economic depression, and a country that had very little experience or well ingrained positive culture toward democracy. A much more justifiable fear of communism, and openness to racial supremacy. Along with some other notable differences that I think make such comparisons tough to fully buy into. Because the inputs are not 1 for 1. I mean pre WWII America was not a pretty place either. Arguably a much more ripe place for fascism, and we made it out ok(though maybe only by luck depending on who you listen to).
..On the other hand, I look at what has happened post Charlottesville, with basically the entire right-wing media. Which has set out to prop up the argument the president pushed of false moral equivalency, and even worse, intentionally over-represents the violence from groups like ANTIFA, while downplaying and under representing the violence on the right. Conflating ANTIFA with BLM and the left wing protests in general. Which feeds a perception that left-wing violence is the real problem. A major problem, and you should be scared.
And if you are someone that buys into and trusts these places, then it does make sort of logical sense in that world to think that maybe extreme measures are justified in dealing with what they believe is the greatest threat(including in that basket several minority groups they do similar things to).
