If they want to remain in the single currency, they will balk. I think the single currency is fucked in any event.
Also, not every invasion since WW2 has harmed american interests. Korea improved the situation in the region.
Also, SM's assessment is correct. Every action against Soviet and psuedo-soviets was undermined at home. Often by people being influenced by card-carrying members of Comintern. Not quite an actual 5th column, but it was damn close.
These are the same people who argued that Trotsky/ Stalin were right wing when the argument needed it. They weren't exactly wedded to the truth.