What if the WH and Al-Qaeda were both using Windows? They probably are/were, you know. What do you think about that?
Let's face it, you just made a moronic statement.
No, actually it is of great concern. Not sure how much you know about what is known as "open source" software, but it's name is exactly what it is, open source code, ie. the pre-binary condition of software in normal text format.
Linux is a member of the "open source" family, and because of that, the entire interworkings of it's internal mechanisms is freely published on websites around the world.
That makes for a very poor security model, and the secrecy of anything, especially as needed in Government or DoD environments, is depending on how "classified" you keep the material.
What this means in total is the source code parent of the sofware running at least the public White House website is know freely available throughout the world for potential exploit, a very bothersome issue to some that work in the field of computer security.