Did anybody in the 1970s say: "If we lose in Vietnam, the Communists will follow us to our shores"?

Some people did say that back in the 1970's. They also said that Vietnam would fall into ruin, be totally taken over and controlled by Communist China, etc. etc. etc. None of which happen. Today, Vietnam is doing okay. They sorted it out on their own, in their own way. Iraq should be allowed to do the same.