Trump's audience is making the fascist salute arms in the air. Trump is holding his hand up as like when taking an oath (practicing for his upcoming court cases?) Trump isn't the one behaving like a fascist or Nazi. Sounds more like he is talking at a bunch of 4th graders ...
Trump told the audience to swear an oath to vote in the elections for him -- he didn't tell his zombies to fascist or Nazi salute the leader like Hitler did.
ergo: the Trumpsters are the ones who are the object of the sarcasm -- his followers behaving the same as Mussolini's Black Shirts or Hitler's Brown Shirts behaved (in the beginning) during the 1920s and 1930s. At least they are not burning books or attacking Mexicans and Muslims with baseball bats in the streets.
Fascist-lite
Trump seems amused by how easily he manipulates both the publicity and how his followers behave.
*Look how these dummies dance to my tune*
Like the 'Little Trumpettes' singing at that rally -- 1940s nostalgia choreographing.