I don't know about the US, but here in the EU most countries have (had) public pension systems. In many countries those failed horrificly, for the sole reason that too many people are getting too old and the balance between people paying into the system and people receiving pensions tipped too hard to be sustainable.
Instead of saving up or investing into unreliable private pension schemes, I invest my money in tobacco, so I won't end up straining the public pension system for unnecessarily long. I'm a selfless hero and I want a god damn medal like right now!
On a more serious note:
I really can't say if people are generally too hard on smokers, but I definitely think they are going about it in completely the wrong way(s). The smoking ban in pubs for example is absolutely retarded from my personal experience. Even before I was smoking I didn't mind the smoke in pubs. It was what you expected.
I've been living in Ireland for almost exactly as long as the smoking ban has been in effect.
When you enter a pub now, the first thing you notice is still the smell. But instead of tobacco it's now sweaty-drunk-people-smell, which I find infinitely more disgusting.
But the absolutely most retarded thing about the ban is that the later it gets, the more people are standing outside of the pub. So instead of a hundred people stumbling drunkenly around inside a pub, you get a hundred people stumbling drunkenly around on the street, falling in front of cars and dropping glasses on the sidewalk and three-and-a-half non-smokers sitting alone inside the pub, having oh such an amazing time...
Don't get me wrong, when I'm walking around outside, I try to keep my smoke as far away from kids as I can, but when you are in a pub, you are a group of adults intent to destroy several of your organs with maximum efficiency, so what difference does damaging one more organ really make?