Why did the date of president Kennedy affect people so deeply?

The answer is November 22, 1963, when President Kennedy was assassinated in Dallas, Texas when he was in the first-term of his presidency.

Explanation:

President Kennedy's assassination stunned not only the US but entirely the world which was at the height of the Cold War and the beginning of the Vietnam War. As the youngest ever elected US president at that time, there were expectations that he would make a lot of achievements during his tenure. He was also missed because of his almost perfect background, his characteristics and his beautiful family.

Refer below.

Explanation:

President Kennedy's death staggered the US as well as altogether the world which was at the stature of the Cold War and the start of the Vietnam War. As the most youthful at any point chose US president around then, there were desires that he would make a great deal of accomplishments during his residency. He was likewise missed in view of his practically impeccable foundation, his qualities and his lovely family.