"What about all those non-smokers who hurt innocent people?"
It's very unlikely that it affects 6,5 billion people. Nevertheless, it's a bad thing, and I never said only smokers hurt people, I'm just saying it barely has any positive effects, it's expensive, it stinks, and so on... all explained in this topic. And it would be completely avoidable if people wouldn't want to smoke whenever they can.
"What about all those non-smokers who take other drugs?"
Except for a few (MJ for example), they have no global effect. They break down in the body of the user in a relatively small time. Some are even useful as last resort painkillers.
"What about all those non-smokers who are criminals/murderers/pedophiles/thiefs/etc and make others suffer even worse than 2nd hand smoke EVER could do?"
Tell me that there's anything worse than dying a slow and painful death screaming for air. Please. Okay, maybe there are worse things, like getting raped or - Nino forbid - losing your life's work in a natural disaster (or some idiots burning your house down), but it's completely different, in that case, you can't stop people suffering just by quitting a habit.
"What about all those non-smokers who do ALOT more damage to the world who drive due to pollution? (I don't drive by the way)"
Neither do I (I'm 16 ffs, how could I honestly drive? XD), but after all, everything causes pollution (even using the computer - requires electricity - power plants - carbon/petrolium, and there you have CO2, SO2, nitrous oxides, methane, all kinds of toxic shit also causing global warming), so it's a fair point, but also inevitable.
"What about all those non-smokers who have evil secret hobbies?"
Hmm... Could you please explain this one?
"What about all those non-smokers who look down on hard working, tax paying, very kind people who do anything to help someone else?"
There's plenty of them, and I really hate them too... But you can't kill someone for his/her behaviour until it threatens the community, and they usually ultimately reach that point. I've known a lot of people like this, and I try to avoid them - but once again, they're not technically killing anyone, they're just idiots and parasites.
"What about all those non-smokers who die for (I am guessing) at least 99% other reasons than 2nd hand smoke?"
Smoke's toxins kill slowly, so one can never know how much these chemicals had to do with that person's death.
"What about all those non-smokers who create other bad toxins?"
If it's unnecessary, they should stop (or at least moderate) what they're doing, too.
"What about all those non-smokers who don't smoke, but are alcoholics instead?"
Again, until the point they hurt other people, it's fine. It's up to you what you do with your body, your soul... and your life in general - but do not trifle with other people's lives. Besides, you drink heavily, too, don't you?
"What about all those non-smokers who illegally download music/games/software and other media content?"
I wouldn't even call them thieves. They just want some entertainment without having to starve - e.g. a better game in Hungary still costs about 1/12 of an average salary of a hard-working white collar worker - about 1/6 of a blue collar worker. Now is that fair?! Media sales are high enough even with piracy at its peak - imagine how rich those companies would get if everyone had bought what they've made.
"What about all those non-smokers who just simply don't give a f@#! about anyone else?"
They're called assholes, and they will be judged in the end, don't worry.
Believe me, I know what it's like to live with a smoker - my father smoked for over 25 years (I was 13 when he finally stopped it), but it looks like it was a bit too late... He literally has no intact organs now. That's why I argue so hard against smoking - but these are my last words in this topic, it seems pretty pointless to try to convince a heavy smoker not to smoke.