I don't think they are overreacting. No black actor/actress receiving an Oscar nomination for two years in a row is not an accident. One year can be considered an accident
And accident? Really? It could simply be that there was no actor/actress worth nominating and it could even happen two years in a row. There were years when I, personally, thought that none of the movies or actor/actresses who were nominated were Oscar worthy, but someone/something had to get nominated and win the thing
but two years in a row becomes a trend. When you consider the percentage of blacks/African Americans in the USA, this is glaring.
I'm not really sure you can consider the percentage of blacks/African Americans in the US. I think for that, you need to consider the percentage of black/African American actors.
I'd consider the percentage of blacks/African Americans when talking about the members of the Academy itself since they certainly aren't made up of what would represent the American population.
I think, as others have pointed out, the problem is not in the nominations itself, it's in the movies which are made and stories which are told. How many movies are there this year which feature blacks/minorities compared to movies which feature white actors? How many movies tell stories which are okay to tell with black/minority actors or even require black/minority actors compared to those movies which tell stories tailored to white actors?
That needs to change just like the members of the Academy needs to change and they need to change in all aspects, not just ethnically but age-wise, too. You need people of all races and all ages to represent the American population and have a truely fair judging panel.
That said, what bothers me the most is that there's always, always a huge outcry over the discrimination against black people. But where is the outcry against the discrimination against other ethnic minorities, against handicapped, against women? Women do get Oscar nominations because there's a separate category for that, yet if you look at Hollywood, then men seem to be the superior species, white men over black men, I'm sure but to be honest, after I just read that Gillian Anderson was offered half of Duchovny's salary for the X-Files revival, I wouldn't be surprised if even black men earned more than white women or were offered more salary in initial negotiations. Either way, Hollywood is one big island of discrimination and I would really appreciate it if people (the media) would stop painting blacks as the only victims (in Hollywood) because they are, by far, not the only ones.