I'm not a fan of George Bush, but neither am I a fan of Obama. What I don't like is the hypocracy between how the two of them were treated by the population and the media.
The original letter is here, as is a response. What I find particularly disturbing about the response is that it misses the point entirely. The point is George Bush was openly criticized for every gaff during his presidency. Criticizing Obama for similar errors is somehow not acceptable. That is what this is about.