Why does khrushchev call the U. S hypocrites

answer; i believe that the correct answer is (chronological order);

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.