It's not just
"there's something wrong in our society"
it's
"there's an insidious dark force at work, it's brought us down from our glorious past, these groups of people are involved, violence against this threat is understandable, only a few men are strong and capable enough to lead us out of this...".
In 1930s Germany and Italy the "groups of people" were marxists, jews, gypsies, homosexuals and a few others. In modern Russia it's LGBT, central Asians, objectors to the war, and various religious groups like Jehovah's Witnesses. For Trump and a lot of Europe's right-wing it's LGBT, immigrants, intellectuals, and liberals (though he calls them communists).
"there's an insidious dark force at work, it's brought us down from our glorious past, these groups of people are involved, violence against this threat is understandable, only a few men are strong and capable enough to lead us out of this...".
For insidious dark forces, he alludes to the "deep state", talks about an "enemy from within", and uses phrases like "poisoning the blood of the nation".
For glorious past, there's the MAGA motto, and his narrative that political correctness and lefty lunatics have destroyed American exceptionalism.
For violence, he's repeatedly threatened violence against protestors to his rallies, defended or refused to condemn violence by his own supporters, and suggested that political opponents deserve to have violence inflicted on them.
For only a few men, his prodigious hyperbole about how he's the best at everything, and he literally describes himself as "I am your retribution" who will usher in a "new golden age". And again, he's generally praising of strongman authoritarians around the world