Because there is a contextual difference! Historical context matters, and saying things like "all lives matter" or "we're all the same (so we should be able to use the same words?)" actually undermine the collective struggle this group of people has had to deal with. Life isn't binary, it's always more complex than that. It's not rational to just do a "reset" at this point in time and say "oh, i have nothing to do with what my predecessors have engaged in, so i can't be held accountable"... because that's not true, the predecessors lives and actions directly affect ones life. I understand that sometimes the direct outrage over something small might seem ridiculous, but at the same time I don't understand why people have such a problem with just not using a certain word. It really isn't hard...