You are looking at this as some massive and dramatic plot that only states can possibly influence, and will necessitate massive violence. Your last paragraph shows the inevitable conclusion of that misaprehension, you cast around for a solution you, individually, can implement, find none, and sink back into paralized inaction. Functionally, you give up. Thus is exactly what fascists require of you. Thus is how they remain strong, and prevent dissent.

The truth is, it's smaller actions that will have the real effects. If trump were to drop dead this minute, the fascism would not end. It might receed as they regroup, but has sunk deep into American life now. It is that societal malaise that is driving this, and trump and his cronies are just symptoms of it. The only way that will change is by the steady, hard, work of individuals like you reaching out to the people you can reach, helping them to see that there is a better way, and helping them embrace it. It is by building a groundswell of support like that, that the poison can be neutralized and American life brought back from the brink. In doing so, you deprive fascism of the one thing it mist needs: the appearance of strength.

You say "Engaging the apathetic won’t work" as though it us a truism, but as trump pushes further, as the economy breaks down further, as their friends, neighbours, and loved ones disappear, as life becones less tolerable, it becomes harder to ignore it all, and those who were apathetic will find themselves looking for a solution too. Leave them, and they can easily be swept up by those offering the illusion of strength and power. Instead you, and people like you, need to be talking to them, pkanting the seeds of doubt in their minds, showing them that this is all a sham, that there is a better way. Build support, and support each other. As the numbers grow it will become less and less comfortable for those who support fascism to express that in public. This is going to be rough, but it doesn't have to be cataclysmic.

American fascism will fall, of that I am certain. The only questions are when, and how much damage it does in falling. If enough of the American public can find common cause and work together they can bring that moment forward, and minimise the damage. Fail to do so, and there might not be anything recognisable left afterwards.