Yeah because having your brothers and sisters lynched and hung simply for existing, being attacked by police dogs and beaten by police, being sprayed with water hoses etc all for wanting to be acknowledged as equal to your fellow Americans isn't fighting tooth and nail.
That's not too difficult to contend with.
1. There was no widespread "lynching for simply existing" phenomenon in the US. There were definitely gruesome and isolated cases of that, but small in number. Lynching was a practice of the vigilante attempts at law enforcement in the abandonment/chaos of the post-war South. The vast majority were accused of (at the time) serious crimes. While the nature of vigilantism means that inevitably some lynchings were committed via corruption/framing/sheer racism, you are lying by comparing it to the Yazidi situation.
2. The numbers: About 3,500 (subtracting whites) over the course of a century. Note that a minority were likely to be unprovoked hate crimes compared to a greater number of desperate responses to the post-war crime epidemic, but lets ignore that and use the full quantity. Conveniently, about 3,500 more white black are murdered by black people in the US per decade than the other way around, and those aren't in response to accused crimes in the ruins of a warzone, they are just interracial slayings. So if you're "keeping score" I guess you need to switch teams and start shouting about white power.
The key element you're ignoring is that the only ethnic group to ever be permanently 'demoted' by American society were the Natives. Africans have been upwardly mobile without interruption. You are complaining not about 'America's treatment of blacks' so much as that this upward mobility didn't happen quickly enough, that it took place in intervals, that in a fantasy world slaves would have been purchased from African slavers as an act of financially impossible altruism and immediately assimilated. Even then, US slavery accounted for such a tiny % of world slavery that this act of fantasy altruism wouldn't have accomplished much, so there's also an element of you envisioning America back then as the omnipotent political/cultural force it is today.
In summary I am not denying that oppression has existed in American society, but compared to virtually every other country on the planet, we are forced to squint a bit more to find it and sometimes the cartoonish exaggerations marginalize real 'tooth and nail' resistance and genocide abroad. I mean your #2 issue being protesters sprayed by water hoses kinda illustrates that?