Very few people would be 'representatives of a movement as a whole', what matters is what the movement attract and what its reaction is to those it attracts. Considering the amount of riots, looting and general chaos that ensues after nearly every 'big' BLM protest I find it strange that the whole thing hasn't been put on hold so that they can damage control the bad eggs out of the basket. Instead they just keep on going, riot after riot.
And it has gotten to the point that when I personally think of BLM I do not think of the ones who are trying to have a discussion, instead I think of the bad elements that have drowned out the good. Again, kinda like feminism. I see an awful lot more bad shit coming out of it than good stuff.
So BLM was created for X, but X doesn't matter if Y and Z has far more of a (negative) impact and drowns out X and almost makes it seem like X is merely a tool used for Y and Z to be exploited. Cause at this point, BLM isn't just X, it is X, Y and Z.
The movement for X can continue under a different label, a label that explicitly stands against Y and Z, instead it just keeps chugging along with Y and Z right at its heels.
So it doesn't matter what "Black Lives Matter" says that they stand for; what matters is what the fallout of that movement is. And if that fallout is negative (such as halting a pride parade and forcing them to cave in to their 'list of demands' (entitled shitheads...) or a black guy in a debate at school saying that a fellow white student should commit suicide) then what point is there to keeping "BLM" alive? It's tainted (again, just like feminism) and cannot be saved. Even if they moved on to a new movement that actively spoke out against what BLM produced as well as BLM's original message of X they would still have to deal with the baggage of BLM.
But at least with a new label they could go "no, what BLM became was a mistake but the original message was good".
But what can they do when they time after time fail to keep their protesters (or just opportunist scumbags that just abuse and exploit the moment of protest to stir shit up) in line? What can they possibly do to save their label when it has gotten to this point?
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Though quite frankly I disagree with their original message anyway. What they should do is start a movement that scrutinizes questionable police actions or outright corruption and exploit of their authority as well as demand that cops use body-cams that cannot be turned off by the officers as well as civilian oversight over whenever cops do something shitty or people claim that they have done something shitty.
Instead they just had to focus on BLACK Lives Matter, let's just focus on what the police does to BLACK people. They [BLM] made it a racially motivated movement in the first place. So the original message? Fuck that noise. What I just wrote is a far better message than their garbage because it is completely neutral and has a chance of weeding out the bad eggs out of the police force and even helping cops out as body cams can prove that they did not do anything wrong and acted in the right way.
And if the message I just wrote was adopted and became a success then it would accomplish the same thing as what BLM wanted. They want to stop racism in the police force or whatever. Well, let's say an officer named Fred is accused of racist behaviour? Then the civilian oversight board can simply go over his body cam footage and go over the time he has been accused of being racist and see whether they were right or not and punish him accordingly if he has used his authority to target [insert ethnicity here] because of their ethnicity.