Morality and diplomatic aid? Very well, that behavior is quite British Kingdom.
Jerome Bonaparte secretly admired Britain's opportunistic behavior.
For an island nation detached from the European Continent, the Kingdom of Britain is naturally a troublemaker. Their core policy lies in the European balance strategy, so expecting them to risk themselves for the Sardinian Dynasty is simply a fantasy.
Perhaps Palmerston himself is also waiting for the French Republic to make a move, otherwise the Austrian Empire's sphere of influence would encroach upon France's southern route.
Given that the differences within the Holy Alliance have not yet reached a breaking point, Jerome Bonaparte estimated that Britain would also be unwilling to act on its own without allies.
