(Unfortunately, Reply-Grok may have been successfully partially lobotomized for the long term, now. At the time of writing, if you ask grok.com about the 2020 election it says Biden won and Trump's fraud claims are not substantiated and have no merit. If you @grok in a tweet it now says Trump's claims of fraud have significant merit, when previously it did not. Over the past few days I've seen it place way too much charity in right-wing framings in other instances, as well.)
It feels like we've reached Peak Stupidity but it's clear it can (and likely will) get much worse with AI videos.
Most people who believe bullshit were convinced by something. It might not have been fully rational but there is usually a kernel of something there that triggered that belief. They also probably have heard at least the surface level version of the oppising argument at some point before. Too many debunkers just reiterate the surface argument without engaging with whatever is convincing their opponent. Then when it doesn't land they complain their opponent is brainwashed. Which sometimes might even be true, but sometimes their argument just misses the point of why their opponent believes what they do.
Although he's more populist-left and I'm more establishment-liberal (and so I might find him a bit overly conciliatory with certain conspiracy theorists), Andrew Callaghan of Channel 5/All Gas No Brakes demonstrates a good example of this in the first few minutes of this video: https://youtu.be/QU6S3Cbpk-k?t=38
I agree that one catches more flies with honey rather than vinegar, but many times it doesn't matter what you say or how you say it -- they're gonna stick to their guns. A prime example of this is in Jordan Klepper interviews where he asks Trump supporters how they feel about something horrible that Biden did, to which they express their indignation; then he reveals that it was actually Trump and they dismiss it because it "doesn't matter".