Good for you for gently keeping your friend off the ledge.
Anyone who has kids knows that often your kids pick your friends, at least some of them. We have ended up having a lot of get togethers and even camping trips with the families of our kid's friends. Some of the families have turned out to be very conspiracy minded, believing virtually every conspiracy that comes along, while distrusting the government, researchers and medicine in general.
The things I have actually heard over the years from them:
-The moon landing was faked - somehow they got 1,000s of scientists involved to go along with this, and not even one deathbed confession.
-Cancer was cured almost 100 years ago, using some sort of electro-magnetism device. The government, not wanting cancer to be resolved, bought the patent and shelved it.
-Chemtrails- the white line you often see behind jets in the sky- really chemicals being sprayed upon the population for some nefarious purpose.
-Never get a smart phone- the government uses them to track you. Only use a flip phone and try to keep it off most of the time to avoid tracking. I'm sure that would be really interesting to those tracking me: "Ok, he's just gone into Trader Joe's. Ok, he's buying sundried tomatoes, just grabbed an avocado...." Yeah, but for some reason they want to track us apparently.
-Best to only drink Ph water. It cures virtually every ailment known. One family even installed a $ 3,500 system in their kitchen sink to produce it and tried very hard to get us to install one.
- The best way to fight off infection is not anti-biotics, but colloidal silver. Scary.
It goes on infinitely.
On Covid-19, the ever evolving things that they were saying as time went on:
-First it was not real, back in March 2020: " Do you even know anyone whose gotten Covid? I think they are making it up to control us."
-Then they acknowledged it was real, but no more serious than a cold.
-This soon morphed into being no more serious than the flu.
-Then, there was a cure,
hydroxychloroquine, but Big Pharma, Big Medicine and Big Government did not want us to know that it really works.
-When the death toll became undeniable, they claimed that the numbers were false and being exaggerated.
-Facemasks don't help at all
-Which soon became: not only don't facemasks help, but they cause Covid-19
-Social distancing does not work. They never stopped gatherings. One family we know all got Covid and grandpa ended up the the hospital. He survived. We have extended family members who embraced conspiracy and were not so fortunate.
- The vaccine does not work and is designed to do us harm. Might even have micro-chips in it to implant in our bodies.
-Bill Gates and the evil Dr. Fauci stand to gain billions from the vaccine, as they own the patent.
- Ivermectin is a proven cure for Covid-19, but nefarious institutions, and the evil Dr. Fauci, are hiding this from us because they want us to keep taking the vaccine so they can control us.
Pre-Covid, my wife and I found their whacky ideas humorous. Ok, so they believe in chemtrails, well, so what? You just knew that they had a couple of screws loose and had trouble critically analyzing and discerning information. But, when Covid hit, these crazy beliefs and their distrust of science and medicine became deadly. We have had to cut off some friendships, as some of them really went off the deep end with all of this.
This is an interesting article on why some folks tend to believe conspiracy theories:
https://fivethirtyeight.com/features/why-people-fall-for-conspiracy-theories/