No, it is false that Israel became involved in the civil war in Lebanon when the United Nations was unable to keep order, since in general Israel wants to stay out of most of the conflicts in this region.
Freedom summer, the march on Washington, the Montgomery bus boycott , the Selma to Montgomery march
I believe yes it’s ethical
Nationalism is an idea and movement that holds that the nation should be congruent with the state. As a movement, nationalism tends to promote the interests of a particular nation (as in a group of people), especially with the aim of gaining and maintaining the nation's sovereignty (self-governance) over its homeland.