Edward Grey, the British Foreign Secretary, emphasized the importance of supporting an ally, while Kaiser Wilhelm II highlighted the same point in his speech.
It seems there might be some confusion in your question, as Edward Grey was the British Foreign Secretary during the outbreak of World War I, and Kaiser Wilhelm II was the German Emperor.
They were not on the same side during the war, and their perspectives on entering the conflict would naturally differ.
Edward Grey, in his famous speech to the British Parliament on August 3, 1914, emphasized the importance of supporting Belgium, a neutral country that Germany had violated in its march towards France.
Grey argued that Britain's honor and respect were at stake, and failing to support Belgium would lead to a loss of credibility on the international stage.
He made a moral case for Britain's entry into the war based on the violation of treaties and the principles of justice.
On the other hand, Kaiser Wilhelm II of Germany had a different perspective.
While he did not deliver a specific speech regarding the entry into World War I, his overall stance was influenced by the complex web of alliances and longstanding geopolitical rivalries.
The Kaiser believed in the strength and righteousness of Germany, viewing the war as a result of ill will from those who opposed Germany's power and influence.
The leaders did not agree on the reasons for entering World War I.
Grey focused on the moral imperative of supporting Belgium and upholding international treaties, while Kaiser Wilhelm II saw the war as a result of opposition to Germany's strength.