It common in war to dehumanize the enemy. Makes killing them easier. The line gets blurred sometimes by the participants.
Countries survive by taking needed resources that they don't have at home by taking them from other parts of the world.
If not by paying for them, then by force. Your high standard of living is the result. Do you want to keep it?
An obvious example is Japan importing metals from the USA prior to WW2, taking Indonesian oil by force, etc.
Nazi Germany has no petroleum of its own and hoped to control Middle East oil by force but failed.
The USA buys oil from the Middle East and protects this source using its military. It used force to protect sugar companies (Spanish-American War) in 1895.
England's pearl was India which it took by force.
The Soviets have done the same.