[Catfish]

Ok, thanks for the explanations (and i mean it!).

Regarding (as failing to find a better word) "racial unrest", i wonder why this happened, especially "under" Obama?

On one hand you can blame it on Obama, because as a president he is to be held responsible. On the other hand, i do not think he told the police to engage more in scrapping or shooting coloured people – or did he actively or passively fail to get coloured people, or the police, under control?

You could say so, but for me it looks like the physical presence of a black president either gave the coloured people a reason to go strong/crow? (sry), or it was a defiance reaction from some racist police officers because of this very black president.

I really don't know but some of the events happening around cop-coloured interaction looked nothing else than racist. Yes i know there are a lot of coloured police officers, too, but i speak about those events we all saw in the media.
I fail to see how a president can influence people being in denial, or in plain aggressive opposition..