Yes, it would be considered a proper noun, like Oriental or Caucasian.
Yes, in MLA style, "Black" is capitalized when referring to race.
Generally, "Black Power" revolution should be capitalized as it is a proper noun referring to a specific movement or ideology advocating for the empowerment of Black people.
Race should be capitalized when referring to a specific racial or ethnic group, such as Black, White, Hispanic, or Asian. If referring to race in a general sense, it should not be capitalized.
In most cases, no. Only if the word is the first word in the sentence, or it is a specific name for one specific thing, place or person. Mr. Justice Hugo Black would be capitalized, a black cat would not. The Black Hole of Calcutta or the All Blacks Rugby team of New Zealand would be, but black shoes would not.
Blacks kill People
You can/may do ethier. It doesnt really matter.
blacks
Blacks.
Depends if they are talking to someone, for example "Look at that White kid". If you are referring to a person's heritage, it is not capitalized.
denmark people having blacks?
If you are using Black Hills as the name of a place, then yes, it should be capitalized because it would be a proper noun. i.e. Black Hills of South Dakota. If it isn't being used as a particular place, i.e. Look on top of those black hills which are next to that white mountain, then it would not be capitalized.
No, just blacks.