text: I agree with you that all lives matter.   It fits me spiritually, it fits me socially.   I can not speak for others.   If you expect 100% agreement you will be disappointed.   There are white, black, and any other color, size and shape people, that see enemies in their brothers and sisters and certainly care very little for their welfare.
  
  I don't think that happens until humans find agape* and that's not going to be anytime soon.   Taking your question seriously, you would have to add all people earth wide, (and for some of us it might be finding a connection with all living things).
  
  I don't see how law or politics will every reach the goal that all lives matter.   Those institutions can help, they can provide a legal framework, but they can not change or heal hearts.
  *Christian love, especially as distinct from erotic love or emotional affection.   (Knowing other religions and philosophies seek the same compasion/empathy for all living things, I prefer 'universal' love).