To state the obvious. Enemy of the USA is not the same as being enemy of the people of the USA, its more like being enemy of the government of the USA.
What constitues a country to be an enemy of the USA, and who gets to decide who is the enemy of the USA? On one side, 15 individual from Saudi Arabia was involved with 9/11, 2 from UAE, one from lebanon and one from Egypt. One could argue that so many of the terrorists and their organization originated from Saudi Arabia, they should be considered as the enemy of the people of USA. Yet they are not. To the best of my knowledge, they received no rebuffs from the USA government.
Why is Venezuela and other so called socialist latin american countries enemy of the USA? What did they do to harm the people of the USA? Nothing, yet they are considered the enemy of the USA. On the contrary USA over many decades wreaked havoc in latin america, caused many economical, political and human misery.