In the US, people are attempting grass roots movements to enact progressive change. To do this we need as many people to vote as possible for the most progressive candidates available to correct for the overrepresentation of Republicans. To get more people to vote for progressives we have to convince them that progressive and socialist ideas have merit.
Convincing people is essential to the modern progressive movement. This is because living under neoliberalism inherently conditions people to reject systemic change to political and economic systems and thus by extension they are conditioned to reject socialism. If you've ever talked to people in person about socialism you've undoubtedly heard the phrase "socialism doesn't work" without any supporting evidence or maybe a reference to the Soviet Union collapsing.
This is what socialist theory gets wrong. A person's material conditions do not suddenly make them a socialist or any other ideologue. Ideas have to be internalized and adopted one at a time by a person. All a person's material conditions do is make a person look for answers to their problems. On their own, a person attempts to solve their problems with the tools they've been given by the system they live under. In the case of the US, that system is neoliberalism. They work three jobs, work overtime, work themselves sick even. I've heard people quoted as saying something along the lines of, "I did everything I was supposed to." As in they played by what they thought were the rules of capitalism and don't realize that the extraction of their wealth is the goal of the system.
Fascists understand this need to educate people. They rush to exploit desperate people who are losing everything under capitalism. They present them with their ideas, primarily that some out-group is the source of their problems. They blast the airwaves with propaganda to brainwash people by trapping them in information silos. They get out the vote to advance fascists causes. This is how the fascist movement, that has existed since the 30's in America, has been growing in America since Regan.
Neoliberalism makes people desperate enough that they will try anything, especially fascism when presented with it. It's easy for people to think other people dying is the answer to their problems. When in fact our future depends on us adopting better economic and political ideas. Also, neoliberalism tends to obsess over civility politics and a strict adherence to law and order. Thus even people who aren't fascists themselves don't balk at the totalitarian and/or authoritarian nature of the fascist regime they end up in. They either won't notice the difference or if they do assume it was a natural correction to what our society is 'supposed to be'. While living in a neoliberal society, people end up thinking that either the systems they live under can't be changed or even that they shouldn't be changed. Rather than convincing people to change the system, the fascists convince people to remove other people. Thus they bypass people's acquired resistance to societal change. No where in this, do people naturally internalize and adopt socialist ideas. People who believe in progressive and socialist ideas have to get these ideas in front of people's eyes so that they have a chance to mull them over.
We need to reach out to people by taking advantage of the Internet 2.0, social media, which is not something that was available in the 20th century. We need to convince people that fascism is a self-destructive ideology. That neoliberalism, in a vacuum, inevitably leads to fascism because of the societal and material conditions it imposes. People double down on what they know and make a more extreme and worse version of it, instead of radically changing it. And that socialism is the answer to people's economic problems.