In the end of everything, in my opinion, the wall for the Americans is interpreted as a defense against the Mexicans, as the latter are considered as troubles for the country.
I think that Trump does this, not because of a hated towards Mexicans, but to be recognized by the American people and above all to be appreciated.
i think that there should be no walls or borders in the world, we all belong to our planet earth and everyone should be free to move.
With these actions, humanity can never be good relationships, because there will always be conflicts among the states involved.
Unfortunately i this life diversity is not accepted, even if it is the most beautiful thing in the world.