Idiots claim that Barack Obama is a Kenyan Muslim terrorist and that George Bush is mentally subnormal.

The important difference is that in these cases the given idiot is less famous than the person they make crap about.

Imagine an alternative universe where Barack Obama is just an unknown guy, and some idiots for whatever reason start claiming that he is a Muslim terrorist. I can imagine an anonymous phone call to the police, a police action with some misunderstanding, resulting with too many negative utilons for Mr. Obama.

In our universe, Mr. Obama has the advantage of being more famous than any such possible accuser. However, SIAI does not have the same advantage.