I'd do the same thing I'd do with anyone that has a different opinion than me: try my best to have an honest and open discussion with them to understand their point of view and get to the heart of why they believe said thing, without forcefully tearing apart their beliefs. A core part of that process is avoiding saying anything that could cause them to feel shame for believing something that I don't, even if I truly believe they are wrong, and just doing what I can to earnestly hear them out. The optional thing afterwards, if they seem open to it, is express my own beliefs in a way that's palatable and easily understood. Basically explain it in a language they understand, and in a way that we can think about and understand and discuss together, not taking offense to any attempts at questioning or poking holes in my beliefs because that is the discovery process imo for trying something new.

Online is a little trickier because you don't know if they're a dog. Well, now a days it's even harder, because they could also not have a fully developed frontal lobe, or worse, they could be a bot, troll, or both.

I found it highly complex, but chalked it up to my own unfamiliarity with both C and the rust language and what they are trying to accomplish.

I found C way more approachable and rust filled to the brim with more rabbit holes and "logical-in-their-own-world/reality" way.. but again, I believe that's due to my own inexperience. Truthfully, in 10 years when rust fervor has died down and it has become more normal, I could see people vomitting at the thought that rust was pushed into the kernel, and there to be a strong push for not removing it but rather simplifying the code somehow? I'll definitely be writing another handful of projects in rust again in the next couple of years though, I liked how my last ones ended up