Again, this is rubbish that completely dismisses what has gone on with the Tulsa Race Riot for nearly 100 years now. It was covered up. It was finally said to have existed much later. The term domestic terror attack doesnt come into popular lexicon until 1994. There is no rush for America to call it a terrorist attack. Yet, its a pick and choose problem.  

 https://en.wikipedia.org/wiki/Domestic_terrorism_in_the_United_States 

 Bombing of Los Angeles Times building - 1910 
 Wall Street Bombing - 1920  

 These are said to be domestic terror attacks but I don't see any sources having to SAY they are domestic terror attacks. Its just accepted by what HAPPENED that its a domestic terror attack. You don't need a source to STATE that. You need facts to show substantiate, and then you need to source those facts. FOr example, we don't have to show proof that Phil Ivey is a poker player, we see him playing poker to know this. We then note that he has played poker and source that this has indeed happened. We don't source someone calling him a poker player as evidence that he is a poker player. That is NOT how wikipedia works or has ever worked.  

 So if you want every time someone has called something something to be sourced, then the entire system needs to be uprooted. But we all know this. This is just a tactic, its an excuse to justify actions instead of actually confronting the issues head on - what happened in fact was indeed a domestic terror attack by definition and there is no disputing that as the facts are in the wikipedia article already. You can't dispute those facts, and those facts add up to domestic terrorism. But none of you will actually READ the article to see that. Stop with the face. This is a circus.