No, it invigorated it.
Bloody Sunday in Selma was one of the most successful protests in history, where police disproportionately responded to nonviolent disobedience by beating marchers with batons. It was successful not in spite of police violence, but because of it. The hundreds of demonstrators grew to thousands as people came from all across the country in solidarity.
A new Trump era means a renaissance of civil disruption. The methods competent police have developed to blunt the effect of protest don't project the strong-man image fascists crave. Protest will become much more dangerous again, but will also become much more effective.
I'd like to add that the doomed faction Luthen was trying to get Saw to support were remnants of the separatist forces from the Clone Wars. The Separatists were often coded in fiction as the Confederate side of the US Civil War by emphasizing their role as the aggressor and their colonial / pro-slavery politics. Names in Star Wars often are linguistic and historical references, with Gerrera being both similar to Guerrera (warrior in Castilian) and the character is directly inspired by Che Guevara, for example. The name Anto Kreegyr conjures the German word 'Krieger' which also means warrior. This is perhaps intentional to draw a comparison between Saw and Anto, both warriors and rebels, but with very different implied motivations. Anto is linguistically similar to Anton, a common Slavic name. The German language is unfortunately closely associated with the Kaiser during WWI and Nazis during WWII to English audiences, and Russian is similarly associated with the authoritarian Soviet Union.
The implied subtext is that the opportunist Luthen wants the anarchists to work with fascists and authoritarians in the name of defeating a greater fascist threat. Saw's outrage at the suggestion is much more reasonable given this interpretation, as well as his eventual decision to permit their sacrifice to increase the chances of ultimate victory.