Not sure what you are trying to compare here - is it a relative reduction (per head) or an absolute amount?
For an absolute amount the US went from 20t to 17.5t meaning it's still one of the biggest polluters per capita. Or are you looking at the effort expend to reduce the problem? So the US went from 20t to 17.5t - which would be 12.5% - considerably less than the 20% reduction achieved in Germany. So the US put less effort in.
What you seem to be using for (some) of your comparisons is the absolute amount of the relative reductions. That's ... imaginative.
On top of that - this is per head: the US also grew its population at the same time. The actual reduction is less then it appears while the population in Germany stayed roughly the same, so the 20% you see is what you get. The difference between what the US needs to accomplish and what it has actually done is huge.
In any case, given that we need to reach roughly a 55% reduction, even those countries which put the most effort in are well short of the goal.
The blame are the idiots that scream that we must all adopt a protocol that has done LITTLE TO NOTHING TO DROP EMISSIONS.
I don't know if Kyoto is the best way forward. Fact is, the US didn't join, Germany joined. Germany made a lot more progress than the US.
In fact, all I have seen is an outsourcing of jobs to 3rd world nations whose emissions then jump faster then the meager savings that were in the developed nations.
Well Kyoto didn't bankrupt Germany, and the outsourcing of jobs from the US to third world nations can't have been caused by Kyoto given that the US didn't join.
The blame will NOT be USA.
The blame should be on the US for being one of the biggest polluters per capita, and for being - among those free, wealthy and educated countries in the west - the one which makes one of the smallest contribution to solving the problem. You should compare yourself to the best, not to the worst.
That said: there is plenty of blame to go around for China and India - using the West's technology to jump ahead by a few hundred years means they have to act according to modern standards, too. There is plenty of blame to go around for the Europeans as well: overall their reductions are not much better than those in the US, and they fall well short of where they should be, even in the best cases.
So, quit being a fool and look at the facts. Even when you use something as irrational as emission per capitia, America comes up selling of roses in terms of turning things around, while others, esp. those under kyoto and fast growth nations, stink to high heaven.
Only with the help of vodoo mathematics, by any reasonable standard America is among those doing the least.