Question

Why did the struggle for equal rights intensify after World War 2

Answer 1

I don't know for sure, but I suspect it was because people of all
races, creeds, colors, religions, and national origins had equal
opportunity to get shot, poisoned, captured, crippled, and killed
during the war, and those that came back alive were not satisfied
to accept unequal treatment and opportunity at home after it was
over.  

Answer 2

Soldiers came home to a place where there still weren't any equal rights.<span />