It feels like we've reached Peak Stupidity but it's clear it can (and likely will) get much worse with AI videos.
"Waaahhh! How fucking dare you!"
Kimmel made fun of Trump talking about his ballroom when being asked about Kirk, and the right got offended and mad. Although it's not about feelings, it's more about exploiting a tragedy to advance their goals (in this case getting a critic like Kimmel off the air).
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".
Fox (and others like it) offer 24/7 propaganda based on fear and anger, repeating lies ad nauseam. It's highly effective -- I've seen the results first-had.
Making ad hominem attacks against "debunkers" doesn't make your case.
And again, trying to change people's minds by telling them what they believe is wrong is a fools errand (99.99% of the time). But it still needs to happen as that misinformation should not go unchallenged.
It's a trite point and I ended up repeating it before seeing your post but this really is very true even if it may not seem like it. On one hand the practice is basically futile. But someone absolutely needs to do it. People need to do it. The ecosystem can't only ever contain the false narratives, because that leads to an even worse situation. "Here's why Holocaust denialism is incorrect and why the 271k number is wrong" is essentially pointless, per Sartre, but it's better for neo-Nazis to be exposed to that rather than "one should never even humor Holocaust denialists".
*(The same is true of left-wing conspiracy theories. It's silly to pretend that right-wing conspiracy theorists aren't far more common and don't believe in, on average, far more delusional and obviously false conspiracy theories than left-wingers do, but it's important not to forget they exist. I have dealt with some. They're arguably worse in some ways since they tend to be more intelligent, and so are more able to come up with more plausible rationalizations to contort their minds into pretzels.)
The problem with nihilism is that it’s wrong.