BLM is absolutely racist. They do things based on skin color, not injustice. I dislike injustice no matter the person's race. BLM absolutely does not.
Now, that doesn't mean I may not support a specific BLM cause, if I believe it's just. But if you are asking me if I just throw in with BLM on every issue, that answer is absolutely not.
Injustice is injustice. The reason slavery ended was because so many White men were willing to kill each over it. I don't know about you, but that seems like a pretty good argument that people REALLY disliked slavery, even the ones who weren't negatively affected by it.
As far as taking up arms in 1942, the world was at war and the US was scared and confused about what was going on. That is a ripe environment for injustice.
It was wrong what happened to the Japanese, but this country is young and made mistakes. I believe it tries it's best to learn from them, and I hold no long-term grudge over them rounding up Asians and putting them in camps.
If they did it again, I'd be pissed enough to get militant. If the US implemented slavery again, I would be willing to lay down my life fighting against it. Does that answer your question?
No, it didn't. You didn't answer a single question that I asked. I think I can infer that you would not have taken up arms against the US in 1942. I don't see how I can infer anything about 1850 (a decade before the civil war) or 1950 (Jim Crow) from what you said. And I made a statement about BLM, not a question, and I specifically limited it to saying 'Black Lives Matter" in an attempt to focus things to the point where we were discussing precisely the same thing. But you morphed that into the entire movement.