I don’t blame Obama for what he said. For a very long time, to be black in America was to be a target for law enforcement (and I’m sure it still is occasionally at least).
But it is also true that for a very long time in America (and, I suspect, anywhere on the planet earth), even a white person can get him or her self arrested for doing nothing more than arguing with a police officer.
Obama admitted he did not have the facts and still offered up an opinion which was based on the past history between police and African-Americans. Obama spoke stupidly.
Josh Marshall at TPM Media has an excellent post up about the position a police officer is in every time he or she responds to a call. I recommend it.