Holding feelings of hatred for a long time destroys one's mind and body over time

So, think about this for a moment. Being Fearful or angry is actually meant (in our design as human beings) to help us survive bad situations in the moment. It isn't really designed to hold these bad feelings ongoing because then they often lead to insanity or death of the one feeling the hatred towards others in whatever the situation. Because of this it is important to resolve your feelings either through forgiveness or prayer otherwise holding feelings of extreme hatred the rest of your life is suicidal otherwise.

So, cultures that force children to maintain feelings of hatred for other people or groups are also reducing the lifespans of their children by doing this.

This is one reason why Americans do so well because they tend not to hold grudges against people for a long time. However, if people are bad to the U.S. ongoing there are exceptions to this too.

But, generally speaking Americans tend to not hold bad feelings for countries or other groups of people outside of the U.S. that other peoples do around the world.

It's one reason why People from all over the world can get along as well as they do here in the U.S.

We are all from all over the world here mostly except for native Americans who have always lived here for thousands of years already.

Americans tend to think of the whole world as composing the Americans here. So, it isn't useful for us as a people to hold grudges because people from all over the world live here. So, we live amazingly peaceful lives in some ways in this regard compared to other nations on earth.

However, we do have more gun violence than many places but this is mainly tied to cowboy ways of thinking that still prevail out in the country mostly west of Colorado to California from 2 hundred years ago.

But, other than gun issues people get along amazingly well of all races and creeds and religions and countries here in the U.S. especially if you compare us to most other nations on earth.

However, because there are guns here people tend to be more polite than in other nations because you never want to piss people off to the point where they might shoot you here in the U.S. because almost any adult might be carrying a gun or have one in their car somewhere or in their homes.

So, being polite is important if you come to the U.S. for this reason. For example, in other countries where guns aren't available to adults that I have been to often people use trucks like weapons against people with cars. That doesn't happen here usually because people know they would be shot by citizens if they did this. So, if you come to America it is important to be polite to Americans if you want to stay okay.

Politeness here is just saying 'Please" and "Thank you" and wishing people having a Good Day or good afternoon or Good night. This is helpful in making people feel safe in the U.S. Because if you give a positive greeting it makes people know you aren't on drugs or drunk or something and out of control.

So, reassuring people you aren't going to hurt them is important in many situations here in the U.S.