Your list is proof that the damage occurs from a specific level of exposure. Smoking tobacco does not raise any of those potential toxins to the levels that are damaging. If they did, we would see people keeling over after smoking a cigarette.
Uh, and of course accumulation would have no affect.
I suppose you sip half a teaspoon of gas and it wouldn't kill you -- unless you did it 10-30 times a day every day.
No thanks, I'll pass on the rocket fuel, thank you.