You bring up violent organizations and activists whose tactics are often to strike first with violence which begs a larger question. Is it wrong or acceptable to use previous use of violence by the state against protesters and the fact that the state bombs and kills civilians over seas in mass as justification for these bombing and other violent plots that aren't actually in the moment like what we are discussing at a protest or other action?
I think it stems from fear. The same fear that drives those who want all the Mexicans out of this country. The state also uses a lot of propaganda to facilitate and perpetuate this fear and my state is a prime example of that. I also think historically this country has always had a segment of the populace who has feared anything that wasn't a wasp. We've certainly oppressed more than people of color. Throughout our history we have pretended to be accepting of all people and even with the 14th amendment the country has forced every non white male to fight for it's rights from the native Americans to blacks to women and gays. There has always been a fear of Muslims too. Do we blame the media for how they display these violent acts by white people and white groups or have they in fact been fair about negatively portraying all violent groups regardless of color?Now this is on another note but I also find it interesting that whenever people talk about violent groups, domestic terrorists, foreign terrorists, etc., people of color are always referenced. In reality most of the violence that has ever been carried out or advocated against our government have come from white people. An example is the Weather Underground who strictly stated that they would use violent actions against the state if war crimes were committed against the people of Vietnam. They carried out several bombings against federal targets. SLO is another group that committed murder, kidnapping and robbery.
More recent examples would be that of the unabomber Ted Kaczynski who went two decades bombing a variety of targets. Also Timothy McVeigh who bombed OKC in retaliation for the Ruby Ridge incident and Waco.
I bring that up too because when the groups/individual you mentioned advocated violence it was in the name of self defense and was only used when violence was used against them. In contrast the Weather Underground and the other folk I mentioned used violence right off the bat to prove a point or to meet a determined goal against the state who they perceived as their enemy.
I know that you were referencing my civil rights era comment but just decided to throw in that last part to get people's thoughts on why we seem to only remember violent acts carried out by people of color but not by whites in this country.