They did not want the slaves freed
Germany and Ireland were the two countries that sent the most immigrants to America between 1860 and 1900. The immigration was voluntary, not forced by their own governments.
Many countries were affected by communism after World War II. Since I can't see your map, I'll just give some examples.
Cuba- USSR supplied them with missiles to use as a defense mechanism (Cuban Missile Crisis), this was the closest the USA and the USSR came to fighting a war
Eastern European Countries- USSR took over and they became communist
The USA- Engaged in a Cold War with USSR from 1945 and until 1991
Vietnam- Vietnam War, Communists won and took control
Korea- The communists from the North tried to take over the non-communist South. They went to war and ended up splitting it in the middle (38th parallel).
The Bering land bridge is a theory of how early humans migrated to the Americas from Asia about 20,000 years ago.
