The question of ??? ???? ??? ??? may actually be a different halacha in E”Y and US. However, this assumes it is mutar to do altogether. The rate of smoking has decreased in E”Y, although it is far more epidemic in E”Y than in America. Those rabbonim who continue to smoke in E”Y have either disconnected themselves from listening to halacha (see the poskim above who paskened clearly that it is assur) or have decided for themselves that it would be too difficult for them. I do not know how to justify their behavior. However, with all the Torah knowledge they may possess, I would not accept any of them to serve as eidus by the chupahs of my children, since they are definitely being oveir an issur. Quoting poskim or others who spoke about smoking before its dangers were known is irrelevant to a discussion of halacha, since we must judge by the present accumulated information. And it is without any doubt that smoking is assur.
By the way, all those I know that smoke do so on Yomtov as well. And there is a serious question of whether it can be done on Yomtov even if it were to be somehow mutar at other times.