How did the long American tradition of isolation from permanent foreign entanglements create tension in U.S. policy during the early Cold War?

The long American tradition of isolationism made many Americans
want to withdraw from international affairs after WWII. They did not want to get tied to any
permanent alliances with any countries in places (like Western Europe) that did not have any
direct and obvious relevance for US security.

This came into tension
with the needs that were brought on by the Cold War. The Cold War made it important for the US to
be dedicated to relationships with the countries of Western Europe. They needed to form
long-lasting relationships with those countries so that they could work together to hold back
communism.

In this way, the needs of the Cold War came into tension
with the idea of isolationism that had long been a major part of US foreign
policy.