Well, your facts certainly aren't completely in order. For starters:
"Basically the United States dedicates an entire month to "Black History" (That is, history of black people). No other month (AFAIK) is dedicated to any other minority or majority."
Is not true. Hispanic Heritage month is celebrated from september 15th to october 15th. National Asian Pacific American month is the month of May. May is also Jewish American Heritage Month.
"Black people never domesticated horses. So without people of other races, the invention is useless."
This is not true. The original cowboys of the wild west were black. Feel free to look that up.
"No black structure would have ever needed escape ladders if it wasn't for the introduction of other races and their technologies."
That is also not true. You might want to take a moment to do some research on the egyptian pyramids and find out exactly how they managed to get down from those pyramids 
"4))
"Key Chain"
Same reason as #1. Without other races, black people would never of had a reason for keys..."
Ummmm, also not true. Feel free to find out how they opened up the tombs of the ancient egyptian pharoahs. They didn't use the traditional keys that we use today but still, the method of locking and unlocking doors applied.
Honestly, it just seems to me that you're prejudiced skoe. I could be wrong, but I don't see how people learning about their history is a bad thing. The same concept applies to Independence Day, Memorial Day and pretty much any other day where you celebrate and take time to remember. There are no financial benefits to black history month. There is no donations given to hispanics during hispanic heritage month. What is it all about? It's about unity and cultural education and awareness.
It has nothing to do with you really. You're not black, you're probably not interested in learning about black history judging from your uneducated posts. They also rarely speak of black culture in school. However if it's so stupid, then don't celebrate it. Nobody is forcing you to. As of now, what you're doing is the equivalent of seeing your neighbors having an anniversary party and going over there complaining about how it's prejudiced of them to do so when there are people that are single.
In the simplest way, why do you care what they do if it's not hurting you?