Right, it's bizarre of the other poster to say I need to cite sources of Hitler references in modern times. It's a daily thing online, and when Trump was in office, half my FB feed every single day had Hitler references galore - referring to Trump's policies on the border, or detention centers, or white supremacy, or "China Flu," or any number of things. (I made plenty of those kinds of historical comparisons myself.) And these were from people of various backgrounds, not just history buffs. "Hitler" is very much still in the daily lexicon of modern discourse within all levels of society.
The problem was that the criticism of Trump centered more on his personality, as well as the fact that an interloper like Trump managed to knock off the Clinton Political Machine. After that, it was the job of the MSM to bait Trump into making enough mistakes that could be used against his re-election bid, using his own personality against him.