The Germans are grateful, but they also hold grudges.
To be precise, between nations, it should be about "interests" rather than "gratitude" or "grudges," as that seems childish.
But when considering specific circumstances, it's different.
Shire knows that in the future, the German Emperor and his regime will be overthrown, and a democratically elected government will be established.
One of the characteristics of a democratically elected government is that those in power must take citizens' sentiments and thoughts into account as much as possible.
If the German public generally believes that the British and American governments supported the German Emperor during World War I, persecuted Germany, entangled it in war over loans, and left Germany with huge reparations that made the citizens miserable.
At that time, the German public would see the British and Americans as enemies, considering them the instigators who chained Germany into signing unequal treaties.
