This statement is true.
In the 1960's many African Americans and black leaders rejected integration and non-violence in favor of<em> separatism and aggression.</em> Many were concerned about the cost of the peaceful approach - many injuries and deaths, without really resolving the segregation in the north of the country, concentrating on the southern part only.
A movement called <em>Black Muslims </em>emerged, with Malcolm X as its spokesman, demanding a separate, black only nation in the USA. This movement thought non-violence meant non-defense, thus admitting to racial segregation.
Another extreme black leader was Stokely Carmichael with his <em>Black Power. </em>He advocated the rights of black people to take their own power, without waiting for the whites to give it to them.
I think most of us have, but if this question was assigned to you, this question can only answered from your perspective, and not the views of others.
After Italy had agreed to switch sides and help defeat the Entente, they thought they deserved more, being one of the Big Four. Great Britain promised to give them a few of the Slavic countries, but they had other plans to make a large Slavic country known later as Yugoslavia. So, Italy was unhappy because they got cheated by Great Britain.