My response is simple, and I'm using your own post from the "General Election Watch" thread to make my point. I only had to tweak a few words to make it relevant to me:
I can't vote for the neoliberal version of the Democratic Party, so I'll be voting Green for the third time. I think the neoliberals have turned the party into a Republican-lite austerity party that supports Wall Street, wealthy elites, endless wars, and genocide. That might appeal to former neocon Republican voters, but it goes against my fundamental beliefs.
I think the anger and hatred that voters have for MAGA Republicans, because of the damage they have done to our country, is way stronger than any enthusiasm for the Dems.
The Dem Party's move to the right will just encourage the Republicans to move further right to distinguish themselves from Democrats. And when people eventually become disenchanted with Democrats, the main alternative for people to vote for will be a far-right party which will be a disaster for our country. If that happens, neoliberals will be partly responsible for that.
If you're voting Green because today's Labour Party "goes against your fundamental beliefs," why are you so strongly opposed to Americans who choose to do the same thing? I know Trump or Harris will be the next president, but that doesn't mean I have to co-sign either of their agendas. A third-party vote or not voting at all send their own message.