Don't know why the poor rating on the answer above, I agree completely. I would add a couple of other effects the war had on Americans at that time too.
First, this was the second major war Americans had fought in one decade, which meant another draft which means the younger brothers of those who had fought in World War II, and sometimes the same ones who had, would be leaving again to fight another war they may not come home from.
Second, Americans were unclear what we were fighting for. It ws an unpopular war, and Truman was an unpopular President because of it. Once the war ended in a cease fire, many Americans, and veterans for that matter, were angry that we hadn't "won" and what had all the blood and sacrifice been for if they weren't going to be allowed to win?
And it surely made them more afraid of communism and the Soviet Union, as stated above, and more likely to vote for hard core anti-communist politicians like Richard Nixon.