I have never heard that saying attributed to FDR.
“To defeat it, someone will have to mount a credible, effective, and sustained ground campaign to recapture the ground it has taken. It is not a diffuse terrorist network that can be suppressed and broken up by a combination of special forces, intelligence, and police. It is not a beleaguered insurgency sheltering in caves or jungles that its opponents can marginalize through the smack of government. It is a state, backed by armed forces of at least 20,000 fighters (at conservative estimates) that commands major urban centres.”
I keep thinking about the refugees that are becoming an ever bigger problem in Europe. Maybe they should be told you will be helped on one condition: You will be taken to a military base & run through boot camp & then you will be returned to your country to fight the Islamic State. They should be willing to clean up the mess of their own country!
I would have thought he was referring to his alliance with the USSR (who DID NOT help in our war against Japan).