I agree with all of that. Except for the part about possibly appealing to the anti-war voter if it would help them win. There are some -- Biden for instance -- who clearly would rather lose than do that. I don't know Harris well enough to judge.
I think it's sad that people complain when someone says that they won't vote for the lesser of two evils. It's sad because it shows a profound misunderstanding about how democracy is supposed to work, and what they're entitled to demand from their fellow citizens.
The largest voting block in every election is the depressed voter. And the reason is that our system is constructed to favor a broken two-party system even at the expense of civil participation that can solve our problems. Millions of people don't vote because they see no benefit in doing so. The problem to be solved is that the political system has failed these people, not that they aren't showing sufficient enthusiasm to do paperwork to satisfy the demands of people who feel invested in the outcome of elections.
The media falsely claims that each candidate has 47% support when really they each have about 30% support, and a larger number of people have not felt any interest in supporting either candidate. That's a massive failing in reporting and political process.
The first thing you need to know is that if Trump gets elected, there is no discernible point between whether he "goes dictator" or not. People just use power and whether they're a dictator is a subjective exercise for historians.
Second: if Trump gets elected, everyone should actually be doing the same things they do if Harris gets elected, which are also the same things we should all have been doing under Biden, Trump, Obama, etc: which is building a base of local power to stand up for the most threatened among us and push back against authoritarian state power.
In practice, this means getting to know your neighbors. Knowing who serves as your mayor and city council and county council, and police chief, and local prosecutor. Then you need to organize with your local community to build political power to support democracy and oppose authoritarian power. And if you and the folks in the next town do this, you form a bloc of political will to do the same thing at the state level, and eventually the federal level.
This work still needs done if Harris wins. She is a better person than Trump, but the larger system both would command is a loaded gun. We cannot simply keep trying to keep the gun in the hands of the lesser of two evils, we need to remove the bullets. That means things like public financing of elections and ranked choice voting. It's not as dramatic as shooting politicians you don't like, but unfortunately, in the real world this is how dismantling fascism actually works.