If US could remove all of its blacks in 1900 (repatriate into Africa, let's say), with the money saved it could literally buy every single country in the world their own International Space Station program from start to finish and still have a lot of money left. Do you seriously think that's not a large hindrance? Do you not realise we're about 5 years away from a crisis which could've been prevented peacefully in 1970? Do you realise there are no more "good" solutions left? Do you understand, that with such a crash we may forever be stranded on this Earth due to how much initial energy investment oil extraction now requires after all the easy wells are drained? Can you grasp the fact, that without a heavy space industry humanity is forever at the mercy of cosmic events, be it asteroids, gamma rays or our Sun heating up and frying us alive, which we could prevent?

Are you seriously going to tell me our civilization and its future potential are not threatened?

Yes, you could attribute the same crippling influence to gay interventionist wars, global subversion, bank bailouts, etc, but blacks are an undeniable part of it too.