[Spirochete]

Doesn't the Bill of Rights extend to all Americans, whether or not they reside in a state? Should people in Washington D.C. not have the freedom of speech? (rhetorical).

Well, since constitutional rights extend to illegal aliens, one could argue that they cover DC residents as well.

[GrandEagle]

One could very well make that argument - however, it still doesn't change the FACT that the Constitution is an agreement between the States as to what authority the Federal government has.
It no more applies to non state residence than a loan agreement you sign applies to me.
There are a few things that make D.C. a bit different that the rest of our possessions though. It was ceded from other States to become the seat of Government. It SPECIFICALLY was not to become a State so that the FEDERAL government would not be able to favor that State.