Hitler and Mussolini were only the primary spokesmen for the attitude of domination and craving for power that are in the heart of almost everyone. Until the source is cleared, there will always be confusion and hate, wars and class antagonisms.
Christians, like everyone else, are prone to be selfish and scared, and wanting others to think well of them. So, although we possess what one part of us knows is the greatest news in the world, we don't act as though it is. Consequently, we share the gospel less than we should.