Being a military attack not sanctioned by the UN, the US is lucky his western allies haven't harshly condemned it and announced sanctions against the US, as European values and tradition dictate. Except with the US, because reasons.
It is European passion for justice and sense of right that makes us not follow the US. A real shame it does not make all of us condemn about what they are doing. If it doesn't come from the International Criminal Court or the UN, it is not justice; it is exactly the opposite. Invading another country because you say so is evil no matter who does it is Nazi Germany, Putin's Russia or Trump's US.
Bush Jr. invasion of Irak, for example, was not exactly cheered from Europe, and he at least tried to get UN approval.
Graham seems to have a profound ignorance of history and what European values are.