INfinite thoughts, yes you are correct. There are many underlining problems that have caused me to become this intolerant of cigarettes and other things also.

E.g. I got a bacterial / viral infection in 2003 that caused a great deal of damage in me that I never recovered from. Since that time, I become severely ill and toxic very easily from any toxic exposure and suffer long term. So I fear it may have caused damage or defects to my immunity and possibly even the blood brain barrier.

So yes, I simply cannot smoke. I also cannot enter a dental office without becoming mercury toxic. all because of the mercury vapor already in the office environmnet. All this since that infection. Sad, but true.

So yes, you hit the nail on the head.