Why do Blacks still complain about slavery when the Native Americans had genocide used on their people?

I mean if anyone has a reason to actually raise hell I would think it would be the Native Americans, but for the most part they have remained relatively silent over the systematic genocide that was perpetrated by the US Federal Government against their ancestors and the dilapidated reservations that many of them still live on today. So why do Americans of African descent still complain so loudly about how their ancestors were treated in the PAST?!?!? Don't they understand how silly it makes them look to keep harping on a subject that ended 145 years ago and that was systemic through the entire economy of the south and earlier in northern states. I mean slavery is bad, but has no comparison with outright government sponsored genocide.