Americans had many different reactions. Many protested the Accords because it neglected Palestinians. Others wanted peace.
Newspaper Article portraying the Accords positively ("Mideast peace Framework Signed", Los Angeles Times)
"Pro-Palestinian Demonstration in New York" (Remembering Sheila Ryan)
"Pro-Palestinian demonstrators protest against Israel and the Camp David Accords outside of the White House circa 1979" (Foreign Policy)
Protest against the Accords (Remembering Sheila Ryan)
The USSR supported Palestinians and Arabs. The government released a statement condemning the Accords, possibly because Sadat cut relations previously, or due to general hatred towards the West.