Perhaps, but not yet. He's groveling now because his country is beginning to feel an economic problem. Groveling is good. Germany needs to grovel a bit more.
You are right, the apology should be accepted in time. However, what Germany and France need to realize, the economic problem they are now beginning to experience isn't from the government here. It is from Americans. I don't have to buy their products. George down the street can make a choice to buy their products, but right now George isn't buying. An apology to the US is not going to heal the rift with Americans. I'm mad and I'm staying mad. This sniveling, whining isn't working for me.