Okay, let me ask you a few questions:
1. I'm getting the impression you believe that BLM is a Black supremacist group. How did you come to this conclusion, exactly?
Now, I will admit I am no expert on BLM. However, I have yet to see them as an organization display that ideology. Are there a very small amount of individual members who believe that ideology? Perhaps, but BLM has had an emphasis on intersectionality from early on, and that kind of thing ususally turns extremists away.
My guess would be that someone's selling you paranoia, and you're buying it in bulk.
However, I agree that it is important to be very critical of organizations and government alike. But I'm going to need some evidence to support the claim that BLM is Black supremacist, if indeed that is what you are insinuating.
And no, I don't believe they can do no wrong. I am strongly against slavery reparations and I think affirmative action should be based on class not race.
2. What exactly do you define as a 'leftist'? The definition I'm familiar with is anyone who holds left-wing views. This applies to a wide array of people, however, you seem to apply it only to the most extreme aspects of left-wing politics.
That's kinda like the SJWs who say ludicrous things like that voting for Trump makes you a Nazi(If you did vote in 2016 I would assume you voted for him, seeing that you are strongly conservative). While there were some Nazis who did vote for Trump, most people who voted for him, were, you guessed it, NOT Nazis.
See my point? Blatantly labeling anyone who disagrees with you as an alt-leftist is really no better than the SJWs who like to call you a Nazi just because you happen to hold right-wing views.
3. How exactly is what I said propaganda? I cited specific factual historical events. If racism wasn't the root cause of those events, then what was? Answer me that. Do you deny the occurrence of the events I mentioned?
I'm no doctor, but man, from what I can tell it seems you may be suffering from LWDS(Left-Wing Derangement Syndrome) It's similar to TDS(Trump Derangement Syndrome) except it occurs in the right quadrants of the political spectrum, and the target of the derangement is Left-Wing politics. Symptoms include:
-Hatred of anything even remotely Left-Wing(even moderate stuff)
-Assumption that anyone who disagrees with even a few of your views is part of some crazy liberal agenda
-Paranoia about minorities
-Denial of obvious flaws present in one's home country