Do people in wealthier countries have a moral obligation to help those in poorer countries?

Well look at Russia, helping poorer country to develop, look at the good things Russia doing in Jamaica 🇯🇲  Latin America, Africa countries, in so many countries around the world and China helping poorer countries, China build schools and hospitals and roads in Jamaica 🇯🇲 free of charge and in many Latin America countries and in Africa countries. But America look what evil they are doing around the world to poorer countries and making war around the world against poorer countries. Look now no one no countries no longer wants to do business with America, no one wants to travel to visit America from when they killed that man from Canada, no one want to visit America. I’m going of track sorry about that.