> no amount of discussion is going to change their minds

It's a slow process. A MAGA extremist isn't going to read "LGBT rights are human rights!" and say "Ah, I didn't realize! Of course!" and become a liberal.

Maybe they argue with someone about how tariffs are going to be great for the country, and they don't change their mind. But a few months later their neighbor in trucking loses their job, and their friend in construction is talking about how hard it is now, and they start to have a few doubts. They think back to how the guy they were arguing with said this would happen.

And then they argue with someone that only illegal aliens are going to be deported, and they don't change their mind. But then when US citizens start being sent to the camps, they remember that they thought this wouldn't happen and even argued against it.

People do change their mind eventually. Even violent fanatics have changed their minds: the Maoist Red Guards lost steam, the IRA followed a peace process as did FARC in Colombia. If you love liberty, democracy, peace, and prosperity, then I think your best move is to persist in trying to convince MAGA extremists, while understanding that it will take a long time and potentially a lot of chaos and conflict.