> It would be rewarding bad behavior though. Since there would then be no incentive to stop, voting for Harris would increase the likelihood of the Democrats continuing to skip primaries or promote candidates from within

Speaking of myopia... so a voter considering voting Dem should have thought, "Well, if Biden died today she would become President for awhile anyway, and if he died after winning she would be president for the rest of his term, so she's halfway to being a presidential candidate anyway... but I'm really pissed they didn't re-run the primaries in ways that might not even be legal and would inevitably invite attacks on the legitimacy of the winner, so I'm going to teach them a lesson. I'm so mad I didn't get a chance to have a new-blood lefty or whoever I think is better than Harris but somehow didn't beat Biden, that I'd rather make it more likely for the far-right to win again. I won't vote for someone who disrespects democracy by accepting an unprecedented party nomination, I would rather the winner be the one who disrespects democracy by egging on violent attacks on the capitol, attempting fake elector schemes and pressuring the VP and state governors to throw the election, and violate campaign finance laws. I may be saddling myself and the entire country with a president I don't want, but at least I will have stood my ground stopping Democratic party insiders from upgrading a nearly-nominated VP candidate to Presidential candidate!"

That is the argument that I am saying is stupid and irrational, not being Republican or voting for Trump per se. I just don't see a reasonable, self-consistent argument from "I'd consider a Democrat, but they bent their own rules" to "I should let the non-Democrat who has broken laws win." That's emotion, insistence on following one rule at the expense of all others, and denial of political realities, not logic. And people are free to vote on feelings and perceptions, as I am free to argue they were stupid or irrational if they say this is their reason.

And yeah, some of those accusations against Trump haven't been proven in a court of law, but neither has the idea that Harris was illegitimate.

If you care about Dem ideology etc enough to follow their primaries, you would stick with the party even if they didn't yield exactly the flavor of candidate you prefer, not hang everyone out to dry with a far-right alternative in the generals. If you were content to let the far right win, it doesn't feel like you were truly invested in the Dems anyway, so why should they care how you would have voted in their primary re-run? Again, it's emotionally-driven, this desire or hope to use the party's power to get your candidate onto the ballot, and punish them if they don't do it.

Maybe I should be open to choices other than Trump or Harris, but I feel they're worthless in this climate, and I don't think your premise cares about them either. If you want to vote third party, why care whether one of the two parties followed their nomination rules?

It's also "fun" how Republicans whined about rule-breaking and denying the will of the people in this situation, then a few months later they're entertaining plans like putting up a strawman for president so he can resign and give Trump a third term by succession. (Which as I understand, most lawyers believe is BS, but these days... it might just work.)