This morning, a man crashed a plane into an IRS building in Austin, Texas. He left behind a manifesto, an angry rant which made it clear his actions were based on libertarian / teabagger ideology.
US Law defines "terrorism" as "premeditated, politically motivated violence perpetrated against noncombatant targets by subnational groups or clandestine agents". International law defines it as violent acts motivated by a political, religious or ideological cause carried out to coerce, intimidate or influence a government or population. This act meets either definition. But the White House is saying its not terrorism.
The message is clear: crazed right wingers who murder because they hate taxation aren't terrorists. Instead, you're only a terrorist if you're Muslim. Its a disgusting double-standard, and another example of US bigotry.