"I detest having to sit in the line of a plume of cigarette smoke or to have to walk past it /through it in the street. It makes my eyes water, by throat sting, it makes me cough and splutter it smells hideous and makes me nauseous."
You WALK PAST a smoker and all this happens? And you're not being dramatic? 
Serenity The list of things described happens when someone sits so that their smoke is drifting towards me, or if I am trapped in a room with several smokers, yes. There have been many times over the years (thankfully not so much these days) when the smoke in a room has been so overwhelming that I have been forced to leave or spend long chunks of time sitting outside, away from the party just to be able to breath properly and to give my stinging eyes a chance to recover.
Walking past/through it in the street obviously I am not there long enough for all of those things to happen, but it does make me cough and splutter and feel nauseous for that brief period, yes absolutely.
You may not smoke now but I see from doing an AV that you were once very, very addicted and by your own admission were 'obsessed' with smoking and finding opportunities to smoke and that you prioritised it above all else. It appeared to dominate your life, in fact. Obviously you cannot possibly be expected to understand my point of view about how offensive I find it when you have been so in love with the disgusting, filthy, foul smelling stuff yourself.
This was no surprise to me; I find you can always identify someone who is a smoker (or has been) by the dismissive and minimising language they use and by the way they sneerily accuse others of over-reacting or being puritanical fusspots. Why would we over-react? I am aware that others are addicted to other substances like booze, drugs, food, but I don't go around 'over-reacting' about those things because I haven't the last 48 years being directly affected by them or made to feel any real physical discomfort on a regular basis. Other people's smoking does that to me, and always has.
'Hysterical' and 'dramatic' would be if I ran around screaming and crying and shouting at people about it, and behaving disproportionately over it, which I don't, nor have I ever done. I manage to be wearily stoic, tolerant and polite in public and around friends who smoke even though I resent it and find it disgusting and anti-social.
But don't tell me how I should or should not be feeling thanks very much.