BBC bias

Not having watched TV for a good while, I've been out of touch with things back in the UK. Even before travelling over the pond to find a new life, I was aware that the BBC regularly misrepresented factual information to support some form of political agenda. Now it appears that they have been caught red handed fiddling with historical documents, to wit; President Barack Obama's 2009 inauguration speech. You cannot defend this. Whilst holding no brief for or against the politician in question I find myself quite shocked, but not overly surprised, that certain parties would warp his meaning to suit their own bias. Who the hell do the BBC think they are?