Smokers put their cigarettes ahead of virtually everything. They put them ahead of their health, they put them ahead of their savings, they put them ahead of the effects on their own children. Yes, smokers definately place smoking ahead of God.
You are making broad unsupported statements about the priorities of others as you see them and as you don't. This is not your mandate from God. I would be very careful before I started judging the hearts of Christians, be very certain you exceed the standard before you condemn.
I will grant the fact that smoking can be a speck, but the log rolling through this issue deserves a little more attention.