People are not going to start hating Americans. They have already been hating Americans for hundreds of years. It started with the "degeneracy thesis" in the 18th century, where it had been suggested by European intellectuals that the American climate led to physically inferior animals and humans. The reasons for hating Americans change everyday.
Hating a group of people is a completely irrational, unconstructive approach to solving a problem. If one has anger about something, they shouldn't lash out at group of people.
If people want Americans to change something on their behalf, for their benefit, it needs to be from a standpoint of respect. They can start by asking nicely.