Why did President Woodrow Wilson criticize colonialism during WWI and why did his words give hope 2 nationalis

Why did President Woodrow Wilson criticize colonialism during WWI and why did his words give hope 2 nationalists in Indochina, China, and elseehre? What did Wilson actually agree to regarding most European colonies at the Versailles Conference at the end of WWI? How did this change in policy affect the view of America and democracy held by nationalists such as Ho Chi Minh and Mao Zedong?