What are the disadvantages of christian denominations?

All the differences - - All the confusion - - All the lack of UNITY.

Christians are all supposed to be spiritual brothers; united by a bond of love; working together to get the preaching and teaching assignment from Christ Jesus accomplished; and setting a good example for the rest of the world of mankind.

Instead, mankind has had in wartime, Catholic killing Catholic; Lutheran killing Lutheran; etc etc. None of them respond unitedly to the world leaders "Not us you don't; we ain't gonna take up arms." Imagine if ALL the Catholics, Lutherans, etc said to Hitler, that they would not support his war machine. He would not have had much of an army.