why is there such an issue with people when smokers are around. they tell them to stop smoking and that they are killing themselves, but its still considered rude if you tell a fat person to stop eating so much?
Because fat people aren't forcing you to eat with them.
Its more unacceptable as a smoker because the affects rub off onto people around them, and its the consumption of a poison where as fat people are just gluts.
However being obese is a serious issue. I can assure you health organizations treat all of those matters with the same degree of severity, abolishing smoking is just a more realistic (and day I say "easy") prospect at this point. I think you've noticed governments in some places already getting a bit weird and trying to ban sugary drinks and so on, get set to see more.