If you are using the 'alllivesmatter' hashtag and don't know any better or are confused why people are mad at you let me explain it:
1. The original hashtag 'BlackLivesMatter' was a reaction to a string of well documented cases of police brutality that resulted in the death of a long list of unarmed black people. On top of that there was no appropriate punishment for the police officers involved. They mostly got paid or unpaid leave until the heat died down and continued back at their jobs after that. Meanwhile the families and friends of the deceased got no justice. This sends shockwaves of trauma throughout the immediate community, the country of the US and the rest of the black population outside of the US too. This original hashtag started to really shine a light of the system wide oppression of black people in America and elsewhere.
2. The oppressors decided that this hashtag would gather too much momentum and decided they needed to water it down and dilute it with 'alllivesmatter' to protect the racist system that they benefit from. And to some degree it's working (COINTELPRO). Every time you use that hashtag you are doing the work of the oppressor. You are being used as a pawn. You are being manipulated into diluting a movement that's main goal is end police brutality.
2a. Nobody using the 'BlackLivesMatter hashtag is saying Only Black Live Matter. It is universally understood that all lives matter.
3. So, now that you are educated on the deceitful and hateful and manipulative reasons for this 'alllivesmatter' hashtag to exist you should stop doing the work of the oppressor and stop using it and stop being used.
3a. If you've read all this and understand it and still use the 'alllivesmatter' hashtag then shame on you. You are a terrible human.