The news of the de facto head of state of Spain declaring Napoleon's newborn son being the future King of Spain sent ripples across the entire continent.
Napoleon found himself reading missive after missive from the diplomats of the European nation wanting to get confirmation from him and asking if he had been involved in Spanish affairs.
Of course, Napoleon denied any involvement in the civil war and that denial alone was enough for every nation in Europe to grow more wary of France. They couldn't simply believe it. Some conjectured that it was France who instigated the civil war, but they can't find conclusive evidence of it.
Not only were the Europeans wary of the decision of the de facto ruler of Spain. The populace was befuddled as to why Duke Alfonso was not declaring himself king but instead relegated that to a child who wasn't born in Spain.
