You very clearly *do* need to do research, because you have -- among other things -- chosen your sample rather poorly. If you only pick the people born in the 1950s and 1960s who are actually still alive today, is it any wonder that you don't see the ones who died, or who have suffered serious ill health from passive smoking? But if you actually start to take a more in-depth look at their health, the rates of various smoking-related cancers, and so on, then you see a pattern that totally undermines what you are saying.
The evidence in front of you means nothing if you are incapable of interpreting it. As to dismissing the research due to possible financial links: there has been no greater vested interest in this case than the tobacco companies themselves, who -- it is now known -- did all they could to suppress research into, or publication of research into, the harmful effects of smoking full stop, be it active or passive. It seems like you have fallen for their propaganda (there's the irony) hook, line and sinker.
As to the claim that "Nobody has been certified as dying due to passive smoking." -- this is a highly misleading point. In the end you die because of cancer. All smoking, or all passive smoking, can ever do in itself is to drastically increase the rates of these diseases. It has been shown that people who are exposed to massive smoking more frequently, eg because they live with an active smoker, have far greater rates of smoking-related cancers than those who are less exposed to it.
There is no more arrogant claim possible than the idea that you, or anyone else, doesn't need to do research.