Earlier quoted context omitted.
It's the "with the obvious rational disclaimers" part. The above chemicals have been extensively field tested. Huge numbers of people have eaten them for a long long time, it's safe to assume any ill effects of these are known (although obviously the natural selection had little time to adapt us humans to these substances.)
How do you feel about vaccines? Anti-biotics? Why is fear justified? Isn't the appropriate response reason and critical thinking? FDA approved drugs have been extensively field tested as well. And many "dangerous" chemicals are actually safer than, say, wine. You're just trying to justify your fear of the unfamiliar. It's parochial and small-minded. Do you think that the people who discovered tea, beer, tomatoes, and…
Both extensively tested, although antibiotics are interesting because they created drug-resistant strains. Which shows that it is rational to be on the lookout for unexpected bad effects of new things in general.
> Why is fear justified? Isn't the appropriate response reason and critical thinking?
Never stated it's one or the other. Fear of ill effects is what makes us do the whole critical evaluation, which is good.
> You're just trying to justify your fear of the unfamiliar.
I'm afraid you have read from my comments something that wasn't there at all. "Fear until reasonably tested" = rational. "Fear that makes one ignore all evidence" = obviously irrational.
> Do you think that the people who discovered tea, beer, tomatoes, and cheese thought that way?
They took the risk and won - good for us. I'm just against calling their fellow tribesmen (or countrymen) irrational, especially those who already knew about death caps & similar.