It's intersting that you mention Kerry doesnt saty Germany or France but that he says "allies."
Remember the standard anti-war criticism is that we we went into Iraq without "allies." Which, since we had the UK, Italy, Spain, Australia, Poland, etc really meant that we went in without France and Germany..
So Kerry's "allies" are clearly France and Germany, and now we see they arent willing to help.
As to why this may be seen as a criticism of Kerry's plans. Well its simple, it blows a hole in his big campaign promise on Iraq - that he will get our "allies" more involved.
See:
In fact, high-ranking German officials are privately concerned at the prospect of Mr Kerry becoming president, arguing it would not change US demands but make it more difficult to reject them.
Kerry will ask the same as Bush, and he will get the same as Bush - only our "allies" will feel a little bit more sad in telling us to piss off... Which again is why I feel this is much more about them than either of the candidates.