Andy Ngo thinks Antifa are on a level with the Nazis in terms of wanton violence. Furthermore, he says that 'even the Nazis knew to cover their tracks' and that we didn't know about the Holocaust until afterwards.

Wrong, and offensive on almost every level.

Violence had been building for years prior to the Nazis assuming power, and much of it was instigated by the SA.

In 1932 for example, 105 people died in clashes between SA and opposing groups in Prussia alone - that's one region. https://encyclopedia.ushmm.org/content/en/article/nazi-political-violence-in-1933

SA activity - marching through 'red' neighbourhoods and fighting those who opposed them was a deliberate strategy. The spectacle of violence and the implied 'restoral of order' was the point.

Just think of how Horst Wessel was remembered following his death in 1930. He was turned into a martyr who fell 'bravely in battle' against the Bolsheviks. Violence was inherent to the message - a clash between forces for the future of Germany.

During his time as SA leader in Berlin, Goebbels worked on a strategy of provocation that almost always ended in violence, a form of trolling that would always provide the opportunity for a brawl and the implication that a menace had been dealt with. https://www.spiegel.de/international/germany/how-the-nazis-succeeded-in-taking-power-in-red-berlin-a-866793.html